Maharashtra Board Class 9 Science Chapter 6 Classification of Plants Solutions

Std 9 Science Chapter 6 Classification of Plants Question Answer Maharashtra Board

Class 9 Science Chapter 6 Classification of Plants Question Answer Maharashtra Board

 

Question 1. Match the proper terms from columns A and C with the description in column B.

'A'	'B'	'C'
Thallophyta	Seeds are formed in fruits.	Fern
Bryophyta	No natural covering on seeds.	Cycas
Pteridophyta	These plants mainly grow in water.	Tamarind
Gymnosperms	These plants need water for reproduction.	Moss
Angiosperms	Tissues are present for conduction of water and food	Algae

Answer:
In simple words: This question requires you to correctly pair the plant division from column 'A' with its accurate description in 'B' and a suitable example from 'C'. The goal is to demonstrate an understanding of the fundamental characteristics and classifications of various plant groups.

🎯 Exam Tip: When solving matching questions, first identify the most distinct characteristics or examples to make definitive matches. Then, use a process of elimination for the remaining terms. Understanding the core features of each plant division is essential.

 

Question 2. Complete the sentences by filling in the blanks and explain those statements.
(angiosperms, gymnosperms, spore, Bryophyta, thallophyta, zygote)
a. .................... plants have soft and fiber-like body.
Answer: Thallophyta plants have soft and fiber-like body.
In simple words: Thallophyta plants, such as algae, typically possess a soft, fiber-like body due to their simple, undifferentiated structure and aquatic habitat.

🎯 Exam Tip: When filling in blanks, choose the word that best describes the unique characteristics of the plant group. For Thallophyta, remember their simple body structure and aquatic nature, which explains their soft and fibrous form.

 

b. .................... is called the 'amphibian' of the plant kingdom.
Answer: Bryophyta plant is called the 'amphibian' of the plant kingdom
In simple words: Bryophytes are termed 'amphibians of the plant kingdom' because they live in moist terrestrial environments but require water for their sexual reproduction.

🎯 Exam Tip: The term 'amphibian' for Bryophyta highlights their dependence on both land and water. This is a key concept to remember for their ecological niche and reproductive cycle.

 

c. In pteridophytes, asexual reproduction occurs by .................... formation and sexual reproduction occurs by ....................formation.
Answer: Spore, zygote: Pteridophyta plants show alteration of generation. One generation reproduces by spore-formation and the next generation reproduces sexually by zygote formation.
In simple words: Pteridophytes reproduce asexually through spore formation and sexually through zygote formation, demonstrating an alternation of generations in their life cycle.

🎯 Exam Tip: Understanding the alteration of generation in pteridophytes is important. Clearly distinguish between asexual reproduction via spores and sexual reproduction involving zygotes.

 

d. Male and female flowers of .................... are borne on different sporophylls of the same plant.
Answer: Gymnosperms bear their male and female flowers on different sporophylls of the same plant
In simple words: In gymnosperms, the distinct male and female reproductive structures are found on separate specialized leaves, known as sporophylls, within the same plant.

🎯 Exam Tip: Note that gymnosperms do not have true "flowers" in the angiosperm sense, but rather cones or similar structures. The term "sporophylls" refers to the modified leaves that bear these reproductive organs.

 

Question 3. Answer the following questions in your own words.

 

a. Write the characteristics of subkingdom Phanerogams.
Answer:
• Plants which have special structures for reproduction and produce seeds are called Phanerogams.
• In these plants, after the process of reproduction, seeds are formed which contain the embryo and stored food.
• During the germination of the seed, the stored food is used for the initial growth of the embryo.
• Depending upon whether seeds are enclosed in a fruit or not phanerogams are classified into gymnosperms and angiosperms.
In simple words: Phanerogams are plants that produce seeds for reproduction, where each seed contains an embryo and stored food. They are further divided into gymnosperms and angiosperms based on whether their seeds are exposed or enclosed in fruits.

🎯 Exam Tip: Highlight the production of seeds as the defining feature of Phanerogams. Also, remember to mention the presence of an embryo and stored food within the seed, and their sub-classification.

 

b. Distinguish between monocots and dicots.
Answer:

Dicots	Monocots
Seed Two cotyledons	Single cotyledon
Root Well developed, primary root (Taproot)	Fibrous roots
Stem Strong, hard. e.g. Banyan tree	Hollow, e.g. Bamboo False, e.g. Banana Disc-like, e.g. Onion.
Leaf Reticulate venation	Parallel venation
Flower Flowers with 4 or 5 parts or in their multiples (tetramerous or pentamerous)	Flowers with 3 parts or in multiples of three (trimerous).

In simple words: Monocots and dicots differ fundamentally in their seed structure (one vs. two cotyledons), root systems (fibrous vs. taproot), leaf venation (parallel vs. reticulate), stem characteristics, and the number of floral parts.

🎯 Exam Tip: Use a tabular format for clear distinctions. Focus on specific, easily observable characteristics for comparison. Mentioning examples for each plant part can further strengthen your answer.

 

c. Write a paragraph in your own words about the ornamental plants called ferns.
Answer:
• Ferns belong to the group of plants called Pteridophyta.
• They have well-developed roots, stem and leaves but do not bear flowers and fruits.
• They have separate tissues for the conduction of food and water.
• They reproduce with the help of spores formed along the back or posterior surface of their leaves.
• They reproduce asexually by spore formation and sexually by zygote formation.
In simple words: Ferns are ornamental pteridophytes characterized by well-developed roots, stems, and leaves, and the presence of vascular tissues. They reproduce via spores found on their leaves and do not produce flowers or fruits.

🎯 Exam Tip: When describing ferns, emphasize their classification as Pteridophyta, the presence of distinct plant organs and vascular tissues, and their unique reproductive method using spores, along with their aesthetic value.

 

d. Sketch, label and describe the Spirogyra.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र स्पाइरोगाइरा की सूक्ष्मदर्शीय संरचना को दर्शाता है, जिसमें कोशिका भित्ति (Cell wall), केंद्रक (Nucleus), पाइरेनॉइड (Pyrenoid) और सर्पिल क्लोरोप्लास्ट (Spiral chloroplasts) जैसे मुख्य भाग लेबल किए गए हैं। यह फिलामेंटस शैवाल के अद्वितीय सर्पिल क्लोरोप्लास्ट व्यवस्था को दर्शाता है, जो इसकी पहचान है।
Answer:
• Spirogyra belongs to the division thallophyta. They are called as algae.
• It grows mainly in water.
• It does not have specific parts like root-stem- leaves-flowers but are autotrophic due to the presence of chlorophyll.
• The plant body of Spirogyra is soft and fibre-like.
• It has spirally arranged chloroplasts in its cell.
In simple words: Spirogyra is an aquatic thallophyte (alga) recognized by its soft, filamentous body and distinctive spirally arranged chloroplasts within its cells. It is autotrophic and lacks true roots, stems, or leaves.

🎯 Exam Tip: For diagram questions, ensure your description matches the labeled parts. For Spirogyra, highlighting its thallophyte classification, aquatic habitat, and unique spiral chloroplasts is crucial for a complete answer.

 

e. Write the characteristics of the plants belonging to division Bryophyta.
Answer:
• Bryophyta group of plants are called the amphibians of the plant kingdom because they grow in moist soil but need water for reproduction.
• These plants are thalloid, multicellular and autotrophic.
• They reproduce by spore-formation.
• Their plant body structure is flat, ribbon-like, long, without true roots, stem and leaves.
• Instead, they have stem-like or leaf-like parts and root-like rhizoids.
• They do not have specific tissues for the conduction of food and water.
• Examples: Moss (Funaria), Anthoceros, Riccia etc.?
In simple words: Bryophytes are multicellular, autotrophic plants, often called 'amphibians of the plant kingdom' due to their need for moist land and water for reproduction. They have simple, thalloid bodies with rhizoids for anchorage and lack specialized vascular tissues.

🎯 Exam Tip: When listing bryophyte characteristics, always include their 'amphibian' nature, simple body plan (thalloid, rhizoids instead of roots), absence of vascular tissues, and reproduction by spores. Provide examples for clarity.

 

Question 4. Sketch and label the figures of the following plants and explain them into brief.
Marchantia, Funaria, Fern, Spirogyra.

 

Question 1. Spirogyra.
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र स्पाइरोगाइरा की सूक्ष्मदर्शीय संरचना को दर्शाता है, जिसमें कोशिका भित्ति (Cell wall), केंद्रक (Nucleus), पाइरेनॉइड (Pyrenoid) और सर्पिल क्लोरोप्लास्ट (Spiral chloroplasts) जैसे मुख्य भाग लेबल किए गए हैं। यह फिलामेंटस शैवाल के अद्वितीय सर्पिल क्लोरोप्लास्ट व्यवस्था को दर्शाता है, जो इसकी पहचान है।
Answer:
• Spirogyra belongs to the division thallophyta. They are called as algae.
• It grows mainly in water.
• It does not have specific parts like root-stem- leaves-flowers but are autotrophic due to the presence of chlorophyll.
• The plant body of Spirogyra is soft and fibre-like.
• It has spirally arranged chloroplasts in its cell.
In simple words: Spirogyra is an aquatic thallophyte (alga) characterized by its soft, filamentous body and distinctive spirally arranged chloroplasts. It is autotrophic and lacks differentiated plant organs.

🎯 Exam Tip: When describing Spirogyra with a diagram, focus on its classification as an alga, its aquatic habitat, and the unique spiral arrangement of its chloroplasts, which are its most recognizable features.

 

Question 2. Funaria and Marchantia (Bryophyta)
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र दो ब्रायोफाइट पौधों, फ्यूनरिया और मार्चेंटिया की संरचनाओं को दर्शाता है। फ्यूनरिया में कैप्सूल (Capsule), डंठल (Stalk), पत्ती-जैसे हिस्से (Leaf-like parts) और राइज़ॉइड (Rhizoids) होते हैं, जबकि मार्चेंटिया में भी कैप्सूल, डंठल, पत्ती-जैसे हिस्से और राइज़ॉइड के साथ एक थैलासी संरचना दिखाई गई है। ये दोनों ब्रायोफाइट्स के सामान्य शारीरिक संगठन को दर्शाते हैं।
Answer:
• These plants are called 'amphibians' of the plant kingdom because they grow mostly in soil and need water for reproduction.
• They do not have specific tissues for the conduction of food and water.
• The plant body is fiat, ribbon-like long, without true roots, stem and leaves
• Instead, they have stem-like or leaf-like parts and root like rhizoids.
In simple words: Funaria and Marchantia are bryophytes, known as 'amphibians' of the plant kingdom because they require moist soil for growth and water for reproduction. They possess simple, flattened bodies with rhizoids for anchorage and lack specialized vascular tissues.

🎯 Exam Tip: For bryophytes, focus on their 'amphibian' nature, lack of true roots/stems/leaves (instead having rhizoids and leaf-like parts), and the absence of conductive tissues. Use Funaria and Marchantia as prime examples.

 

Question 3. Fern (Pteridophyta):
ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक फर्न के पौधे को उसके सुविकसित लीफलेट्स (Leaflets) और जड़ों (roots) के साथ दर्शाता है। यह टेरिडोफाइटा समूह की विशेषता है, जिसमें सच्चे जड़, तना और पत्तियां होती हैं, जो इसे सरल ब्रायोफाइट्स से अलग करती हैं।
Answer:
• They have well-developed roots, stem and leaves for the conduction of food and water.
• They do not bear flowers and fruits.
• They reproduce with the help of spores present along the back or posterior surface of the leaves.
In simple words: Ferns are pteridophytes with well-developed roots, stems, and leaves, and possess vascular tissues for transport. They reproduce by spores found on the underside of their leaves and do not produce flowers or fruits.

🎯 Exam Tip: When describing ferns, emphasize their vascular nature and the presence of true plant organs (roots, stem, leaves), distinguishing them from non-vascular plants. Also, highlight their reproduction via spores.

 

Question 5. Collect a monocot and dicot plant available in your area. Observe the plants carefully and describe them in scientific language.
Answer:
In simple words: This activity involves observing local monocot and dicot plants to identify their distinguishing features such as seed type, root system, leaf venation, and floral patterns using scientific terminology.

🎯 Exam Tip: For observational questions, provide detailed descriptions of each plant type, focusing on all key differentiating characteristics. Ensure you use precise scientific terms for structures like venation, root systems, and floral symmetry.

 

Question 6. Which criteria are used for the classification of plants? Explain with reasons.
Answer: Criteria for classification of plants:
• If plants do not bear flowers, fruits and seeds, they are non-seed bearing plants. If they bear flowers, fruit and seeds, they are seed-bearing plants.
• Presence or absence of conducting tissues- Plants such as pteridophytes, gymnosperms and angiosperms which possess conducting tissues are included in vascular plants whereas thallophytes and bryophytes which do not possess conducting tissues are included under non-vascular plants.
• Depending upon whether the seeds are enclosed in fruit or not, plants are classified as gymnosperms (naked-seeds) and angiosperms (seeds covered by fruit)
• Depending upon the number of cotyledons in seeds, plants are classified into dicotyledons and monocotyledons
In simple words: Plants are classified based on several criteria including whether they produce seeds, the presence or absence of specialized vascular tissues, if their seeds are enclosed within a fruit, and the number of cotyledons present in the seed.

🎯 Exam Tip: List the classification criteria clearly and provide a brief explanation or example for each point to illustrate its significance. Focus on broad categories like seed-bearing vs. non-seed bearing, vascular vs. non-vascular, and fruit-enclosed vs. naked seeds.

 

Class 9 Science Chapter 6 Classification of Plants Intext Questions and Answers

 

Can you recall?

 

Question 1. How have living organisms been classified?
Answer:
(i) Organisms have been classified based on the following:
• Cell structure
• Body Organisation
• Mode of nutrition
• Reproduction
(ii) Organisms are also classified at kingdom level and groups and subgroups.
In simple words: Living organisms are classified based on fundamental characteristics such as their cell structure, overall body organization, method of obtaining nutrition, and reproductive strategies. This hierarchical classification extends from kingdoms down to subgroups.

🎯 Exam Tip: When answering about classification, ensure you list the main criteria like cell type, body complexity, and metabolic processes. Mentioning the hierarchical nature of classification (kingdoms, groups) adds depth to your answer.

 

Activity-based questions

 

Question 1. You may have seen a lush green soft carpet on old walls, bricks and rocks in the rainy season. Scrape it gently with a small ruler, observe it under a magnifying lens and discuss.
Answer:
• It shows considerable tissue complexity and is differentiated into two main parts: a root and a shoot.
• They have a variety of specialized tissues within these two regions of the body.
• Same kind of cells are seen throughout the whole body except reproductive cells.
In simple words: The "green carpet" often found on damp surfaces is likely moss (a bryophyte). Observing it reveals a simple plant body lacking true roots, stems, or leaves, with some basic differentiation, and reproduction typically involves spores.

🎯 Exam Tip: For observation-based questions, infer the most probable organism based on the description (e.g., moss). Describe its general characteristics as observed and relate them to the plant division it belongs to.

 

Question 2. You may have seen ferns among the ornamental plants in a garden. Take a leaf of a fully grown fern and observe it carefully.
Answer:
• New leaves typically expand by the unrolling in a tight spiral manner.
• The anatomy of fern leaves can either be simple or highly divided.
• They show the presence of spores formed along the back or posterior surface of their leaves.
In simple words: Observing a fern leaf will reveal its characteristic coiled young leaves (circinate vernation), the varying complexity of its mature leaf structure, and the presence of sori (clusters of sporangia) on the underside where spores are produced.

🎯 Exam Tip: When describing fern leaves, mention the circinate vernation (unrolling of young leaves). Also, highlight the presence and location of spores on the leaves, which is a key reproductive feature.

 

Question 3. Observe all garden plants like Cycas, Christmas tree, Hibiscus, Lily, etc. and compare them. Note the similarities and differences among them. Which differences did you notice in gymnosperms and angiosperms?
Answer: Cycas and Christmas tree are gymnosperms, whereas Hibiscus and lily are angiosperms.
1. Similarities: These plants have special structures for reproduction and produce seeds. During the germination of the seed, the stored food is used for the initial growth of the embryo.
2. Differences: In gymnosperms, reproductive organs have cones whereas in angiosperms reproductive organs have flowers.
3. In gymnosperms, seeds are without natural coverings whereas in angiosperms seeds are enclosed in natural coverings called fruits.
In simple words: When comparing garden plants like Cycas (gymnosperm) and Hibiscus (angiosperm), similarities include seed reproduction and stored food for embryo growth. Key differences are that gymnosperms have cones and naked seeds, while angiosperms produce true flowers and seeds enclosed within fruits.

🎯 Exam Tip: Clearly categorize the given examples into their respective plant groups (gymnosperms, angiosperms). Present similarities first, then clearly enumerate the differences, focusing on reproductive structures and seed protection.

 

Question 4. Soak the seeds of corns, beans, groundnut, tamarind, mango, wheat, etc. in water for 8 to 10 hrs. After they are soaked, check each seed to see whether it divides into two equal halves or not and categorize them accordingly.
Answer: Monocots: com, wheat (it cannot be divided into equal halves)
Dicots: beans, groundnut, tamarind and mango (it can be divided into two equal halves)
In simple words: This experiment classifies seeds into monocots or dicots based on the number of cotyledons. Monocot seeds (e.g., corn, wheat) cannot be split into equal halves, while dicot seeds (e.g., beans, mango) can be divided into two equal halves.

🎯 Exam Tip: For practical activity questions, explain the methodology and then clearly present the results, categorizing the seeds correctly into monocots and dicots based on the observable characteristic of splitting into equal halves.

 

Class 9 Science Chapter 6 Classification of Plants Additional Important Questions and Answers

 

Choose and write the correct option:

 

Question 1. The five-kingdom classification was proposed b7
(a) Robert Whittaker
(b) Robert Hooke
(c) Eichler
(d) Louis Pasteur
Answer: (a) Robert Whittaker
In simple words: The five-kingdom classification system, which includes Monera, Protista, Fungi, Plantae, and Animalia, was developed by Robert Whittaker.

🎯 Exam Tip: It is crucial to remember the key scientists associated with major classification systems. Robert Whittaker is credited with the influential five-kingdom classification.

 

Question 2. In 1883, classified plants into two sub-kingdoms.
(a) Robert Whittaker
(b) Alexander Fleming
(c) Eichler
(d) Robert Hooke
Answer: (c) Eichler
In simple words: In 1883, Eichler classified the plant kingdom into two main sub-kingdoms: Cryptogams and Phanerogams, based on the visibility of their reproductive parts.

🎯 Exam Tip: Historical contributions to classification are important. Associate Eichler with the early division of plants into Cryptogams and Phanerogams.

 

Question 3. Ulothrix, ulva, sargassum belong to
(a) Bryophyta
(b) Thallophyta
(c) Pteridophyta
(d) Gymnosperms
Answer: (b) Thallophyta
In simple words: Ulothrix, Ulva, and Sargassum are all types of algae, characterized by a simple, undifferentiated body (thallus), and thus are classified under Thallophyta.

🎯 Exam Tip: Familiarize yourself with common examples of each plant division. Algae are typical representatives of the Thallophyta group.

 

Question 4. is a bryophyte.
(a) Ulva
(b) Nephrolepis
(c) Funaria
(d) Equisetum
Answer: (c) Funaria
In simple words: Funaria, commonly known as moss, is a classic example of a bryophyte, a non-vascular plant requiring moist environments for survival and reproduction.

🎯 Exam Tip: Identify Funaria (moss) as a key example of Bryophyta. Knowing representative organisms for each group is essential for MCQ-style questions.

 

Question 5. In the seeds are naked.
(a) Pteridophyta
(b) Angiosperms
(c) Gymnosperms
(d) Bryophyta
Answer: (c) Gymnosperms
In simple words: Gymnosperms are a group of seed plants whose seeds are not enclosed within an ovary or fruit, hence referred to as "naked seeds."

🎯 Exam Tip: The term "gymnosperm" literally means "naked seed," which is the defining characteristic for this group. Remember this as a quick way to recall the answer.

 

Question 6. In the flowers are reproductive organs.
(a) Angiosperms
(b) Gymnosperms
(c) Pteridophyta
(d) Bryophyta
Answer: (a) Angiosperms
In simple words: Angiosperms, also known as flowering plants, utilize their specialized flowers as the primary reproductive organs for sexual reproduction.

🎯 Exam Tip: The presence of true flowers as reproductive organs is the hallmark of angiosperms, distinguishing them from other plant groups.

 

Question 7. In the flowers are tetramerous or pentamerous.
(a) Monocotyledons
(b) Dicotyledons
(c) Gymnosperms
(d) Pteridophyta
Answer: (b) Dicotyledons
In simple words: Dicotyledonous plants typically have flowers with parts arranged in multiples of four (tetramerous) or five (pentamerous).

🎯 Exam Tip: Floral part count is a key diagnostic feature for distinguishing between monocots (multiples of three) and dicots (multiples of four or five).

 

Question 8. In monocotyledonous plants, the stem is
(a) hollow
(b) false
(c) disc-like
(d) all of these.
Answer: (d) all of these
In simple words: Monocotyledonous stems can exhibit diverse forms such as hollow (e.g., bamboo), false (e.g., banana), or disc-like (e.g., onion), demonstrating structural variations within the group.

🎯 Exam Tip: Be aware that monocot stems are not uniform. Remember specific examples like bamboo (hollow), banana (false stem), and onion (disc-like) to illustrate this diversity.

 

Question 9. Lycopodium belongs to
(a) Thallophyta
(b) Bryophyta
(c) Gymnosperms
(d) Pteridophyta
Answer: (d) Pteridophyta
In simple words: Lycopodium, commonly known as clubmoss, is a vascular plant that reproduces by spores and is classified under the division Pteridophyta.

🎯 Exam Tip: Lycopodium is an important example of a pteridophyte, often mistaken for mosses due to its common name, but distinguished by its vascular tissue and spore-producing cones.

 

Question 10. Leaves of show reticulate venation.
(a) Bamboo
(b) Banana
(c) Onion
(d) Banyan
Answer: (d) Banyan
In simple words: Reticulate venation, where leaf veins form a net-like pattern, is a characteristic feature of dicotyledonous plants, and the Banyan tree is a dicot.

🎯 Exam Tip: Reticulate venation is a key identifier for dicots. Eliminate options that are monocots (Bamboo, Banana, Onion) which typically have parallel venation.

 

Question 11. Various types of fungi like yeasts and moulds are included in the group
(a) Thallophyta
(b) Halophyte
(c) Xenophyta
(d) Angiosperms
Answer: (a) Thallophyta
In simple words: Fungi, including yeasts and molds, were historically grouped under Thallophyta due to their simple, undifferentiated body structure (thallus) and lack of true plant organs.

🎯 Exam Tip: While fungi are now recognized as a separate kingdom, in older classification systems (relevant to the chapter's context), their simple thalloid body often led to their inclusion in Thallophyta.

 

Question 12. Bryophytes have a root-like structure called
(a) Nodes
(b) Rhizoids
(c) Nodules
(d) Aerenchyma
Answer: (b) Rhizoids
In simple words: Bryophytes lack true roots and instead possess simple, hair-like structures called rhizoids, which primarily function in anchorage rather than significant absorption of water and nutrients.

🎯 Exam Tip: Clearly differentiate between true roots and rhizoids. Rhizoids in bryophytes are simple anchoring structures, highlighting their less evolved nature compared to vascular plants.

 

Question 13. reproduce with the help of spores formed along the back or posterior surface of their leaves.
(a) Halophyta
(b) Pteridophyta
(c) Thallophyta
(d) Angiosperms
Answer: (b) Pteridophyta
In simple words: Pteridophytes, such as ferns, reproduce asexually by forming spores that are typically found in clusters (sori) on the underside or posterior surface of their leaves.

🎯 Exam Tip: The formation of spores on the leaves (often specifically on the abaxial or lower surface) is a characteristic reproductive method for pteridophytes.

 

Question 14. In the reproductive organs cannot be seen.
(a) Pteridophyta
(b) Cryptogams
(c) Thallophyta
(d) Angiosperms
Answer: (b) Cryptogams
In simple words: Cryptogams are a group of plants (including Thallophyta, Bryophyta, and Pteridophyta) whose reproductive organs are inconspicuous or 'hidden', making their sexual reproduction less obvious.

🎯 Exam Tip: Remember that "Cryptogams" refers to plants with hidden reproductive organs, in contrast to "Phanerogams" which have visible reproductive structures (flowers/cones).

 

Question 15. are mostly evergreen, perennial and woody.
(a) Pteridophyta
(b) Thallophyta
(c) Gymnosperms
(d) Angiosperms
Answer: (c) Gymnosperms
In simple words: Gymnosperms, particularly conifers, are characterized by being evergreen (retaining leaves year-round), perennial (living for multiple years), and having woody stems, forming large trees or shrubs.

🎯 Exam Tip: These characteristics are typical of the larger, more robust gymnosperms like pines and spruces, distinguishing them from smaller, non-woody or deciduous plants.

 

Question 16. Gymnosperms bear male and female flowers on different of the same plant.
(a) Branches
(b) Roots
(c) Sporophylls
(d) Flowers
Answer: (c) Sporophylls
In simple words: In gymnosperms, the male and female reproductive structures (cones) are formed on specialized leaves called sporophylls, which are arranged on different parts of the same plant.

🎯 Exam Tip: Understand that gymnosperms do not have true flowers but instead bear their reproductive organs on sporophylls. Knowing this distinction is crucial for accurate classification.

 

Question 17. In the seeds are not enclosed by fruit.
(a) Pteridophyta
(b) Thallophyta
(c) Gymnosperms
(d) Angiosperms
Answer: (c) Gymnosperms
In simple words: Gymnosperms are seed-producing plants where the seeds are exposed or "naked," meaning they are not covered by an ovary wall or fruit.

🎯 Exam Tip: This is a fundamental distinguishing feature of gymnosperms. The term "gymnosperm" itself, meaning "naked seed," provides the direct answer.

 

Question 18. In the seeds are enclosed by fruit.
(a) Pteridophyta
(b) Thallophyta
(c) Gymnosperms
(d) Angiosperms
Answer: (d) Angiosperms
In simple words: Angiosperms, or flowering plants, are characterized by having their seeds enclosed within a fruit, which develops from the mature ovary.

🎯 Exam Tip: The presence of seeds enclosed within a fruit is the defining characteristic of angiosperms, setting them apart from gymnosperms.

 

Question 19. The plants whose seeds cannot be divided into equal parts are called
(a) Algae
(b) Fungus
(c) Dicotyledons
(d) Monocotyledons
Answer: (d) Monocotyledons
In simple words: Monocotyledons are plants with seeds containing a single cotyledon, which makes it impossible to split them into two equal, symmetrical halves.

🎯 Exam Tip: The number of cotyledons is a key differentiator between monocots and dicots. Remember that monocots have one cotyledon, preventing equal division of their seeds.

 

Question 20 The plants whose seeds can be divided into equal parts are called
(a) Algae
(b) Fungus
(c) Dicotyledons
(d) Monocotyledons
Answer: (c) Dicotyledons
In simple words: Dicotyledons are plants whose seeds contain two cotyledons, allowing them to be easily split into two roughly equal halves.

🎯 Exam Tip: Conversely to monocots, dicots have two cotyledons. This structural feature allows for the physical division of their seeds into two distinct parts.

 

Find the odd one out:

 

Question 1. Ulothrix, Ulva, Nephrolepis, Sargassum
Answer: Nephrolepis: It belongs to division Pteridophyta whereas the others belong to division thallophyta.
In simple words: Nephrolepis is the odd one out because it is a fern (Pteridophyta), a vascular plant, while Ulothrix, Ulva, and Sargassum are all types of algae (Thallophyta), which are simpler, non-vascular organisms.

🎯 Exam Tip: To find the odd one out, classify each organism into its respective plant division. The one that doesn't fit the group formed by the others is the correct answer.

 

Question 2. Funaria, Marchantia, Anthoceros, Spirogyra
Answer: Spirogyra:
In simple words: Spirogyra is an alga (Thallophyta), characterized by its simple, filamentous body, making it distinct from Funaria, Marchantia, and Anthoceros, which are all bryophytes (mosses and liverworts).

🎯 Exam Tip: Remember common examples for Bryophyta (Funaria, Marchantia, Anthoceros) and Thallophyta (Spirogyra). The key is to correctly identify the major group each belongs to.

 

Question 3. Marsilea, Pteris, Lycopodium, Riccia
Answer: Riccia:
In simple words: Riccia is a liverwort, belonging to the Bryophyta division, which distinguishes it from Marsilea, Pteris, and Lycopodium, all of which are pteridophytes (ferns and their allies).

🎯 Exam Tip: For these types of questions, recalling specific examples for each division (Bryophyta, Pteridophyta) is essential to correctly identify the misfit.

 

Question 4. Cycas, Mango, Apple, Banyan
Answer: Cycas:
In simple words: Cycas is a gymnosperm, characterized by its "naked seeds" that are not enclosed within a fruit. In contrast, Mango, Apple, and Banyan are all angiosperms, which produce flowers and enclosed seeds within fruits.

🎯 Exam Tip: The key distinction here is between gymnosperms (naked seeds) and angiosperms (seeds enclosed in fruit). Cycas is a classic gymnosperm example.

 

Question 5. Onion, Papaya, Wheat, Green peas
Answer: Green peas:
In simple words: Green peas are dicotyledonous plants, meaning their seeds have two cotyledons and they exhibit reticulate venation. Onion and Wheat are monocots, and while Papaya has two cotyledons, its other characteristics (e.g., stem growth) often lead to confusion in simple classifications, but Green peas clearly stand out as a dicot.

🎯 Exam Tip: Focus on the most straightforward classifications. Onion and Wheat are monocots (one cotyledon), while Green peas are clearly dicots (two cotyledons). Papaya can be tricky due to some unique features, but the clear monocot/dicot distinction makes Green peas the odd one. In a strict sense, Papaya is a dicot but with monocot-like stem. Given other options, green peas (a dicot) against monocots (Onion, Wheat) is the intended distinction.

 

Complete the analogy:

 

Question 1. Spirogyra : Thallophyta : : Riccia :
Answer:
In simple words: This analogy establishes a relationship where a specific plant genus belongs to a particular division. Spirogyra is a Thallophyta, so you need to identify the division to which Riccia belongs.

🎯 Exam Tip: To solve analogies, first determine the relationship in the given pair. Here, it's "organism : plant division". Apply the same logic to the second part of the analogy.

 

Question 2. Moss : Bryophyta : : Selaginella :
Answer:
In simple words: This analogy shows an example plant and its classification. Moss is a Bryophyta, and you must determine which division Selaginella belongs to.

🎯 Exam Tip: Knowing key examples for each plant division is critical. Moss represents Bryophyta, while Selaginella (a clubmoss) is a representative of Pteridophyta.

 

Question 3. Nephrolepis : Pteridophyta :: Ulothrix :
Answer:
In simple words: This analogy links a plant genus to its corresponding plant division. Nephrolepis is a Pteridophyta, so you need to classify Ulothrix into its correct division.

🎯 Exam Tip: Confirm your understanding of examples for major plant groups. Nephrolepis is a fern (Pteridophyta), and Ulothrix is a filamentous alga (Thallophyta).

 

Question 4. Pteridophyta : Roots :: Bryophyta :
Answer:
In simple words: This analogy describes a characteristic anatomical feature. Pteridophytes possess true roots. You need to identify the corresponding anchoring structure in Bryophytes.

🎯 Exam Tip: Focus on the structural differences in plant organs across divisions. Pteridophytes have true roots, while bryophytes have simpler, root-like structures called rhizoids for anchorage.

 

Question 5. Gymnosperms : naked seeds : : Angiosperms :
Answer:
In simple words: This analogy highlights the defining characteristic of seed enclosure for two major plant groups. Gymnosperms have naked seeds, so you must state the corresponding feature for Angiosperms.

🎯 Exam Tip: This analogy directly tests the primary difference in seed protection between gymnosperms and angiosperms. Angiosperms are characterized by seeds enclosed within fruits.

 

Question 6. Dicotyledon : Reticulate venation :: Monocotyledon:
Answer:
In simple words: This analogy establishes the relationship between a plant class and its characteristic leaf venation pattern. Dicotyledons have reticulate venation, so you need to identify the typical venation for Monocotyledons.

🎯 Exam Tip: Remember the two main types of leaf venation: reticulate (net-like) for dicots and parallel for monocots. This is a fundamental visual differentiator.

 

Question 7. Bamboo stem: Hollow:: Onion Stem:
Answer:
In simple words: This analogy describes the characteristic structure of specific plant stems. Bamboo stems are typically hollow, so you need to identify the descriptive term for an onion stem.

🎯 Exam Tip: Think about the physical characteristics of common plant stems. Onion stems are usually compressed and disc-like, forming the base from which roots and leaves emerge.

 

Question 8. Monocotylendon : Tap root:: Dicotyledon :
Answer:
In simple words: This analogy presents a characteristic root system for a plant class. Monocotyledons typically have a fibrous root system (the given "Tap root" is incorrect for monocots, suggesting the analogy intends to contrast), so you need to identify the characteristic root system for Dicotyledons.

🎯 Exam Tip: Understand the typical root systems for monocots (fibrous) and dicots (taproot). This analogy, if taken literally with "Tap root" for monocot, implies a contrast is sought for dicot, likely "Fibrous root" if the first part was intended to be "Fibrous root", or "Tap root" if the first part had been fixed. Assuming a common knowledge correction: Monocotyledon: Fibrous root :: Dicotyledon: Tap root.

Difference between:

Question 1. Thallophyta and Bryophyta
Answer:

Thallophyta	Bryophyta
These plants grow mainly in water	They grow in moist soil but need water for reproduction

In simple words: Thallophytes primarily live in water, while bryophytes live in moist terrestrial environments but require water for their reproduction process.

🎯 Exam Tip: When distinguishing between plant groups, focus on their habitat and reproductive requirements as key differentiating factors.

 

Question 2. Gymnosperms and Angiosperms
Answer:

Gymnosperms	Angiosperms
No natural covering on seeds	Seeds are formed in fruits

In simple words: Gymnosperms have "naked" seeds, meaning their seeds are not enclosed within a fruit, whereas angiosperms have seeds enclosed within fruits.

🎯 Exam Tip: Understanding seed protection is a fundamental way to differentiate between these two major plant groups.

 

Question 3. Algae and Moss
Answer:

Algae	Moss
These plants mainly grow in water.	These plants need water for reproduction.

In simple words: Algae are mostly aquatic plants, while mosses are terrestrial plants that thrive in moist environments and require water for their reproductive cycle.

🎯 Exam Tip: Note the primary habitat difference and the role of water in their life cycles for clear distinction.

 

State whether the following statements are true or false. Correct the false statements:

Question. 1. Thallophyta are called as the amphibians of the plant kingdom.
(2) Fungi like yeasts and moulds are included in division bryophyta.
(3) Moss (Funaria) belongs to division bryophyta.
(4) Bryophyta have specific tissues for conduction of food and water.
(5) Plants belonging to Thallophyta group are only unicellular.
(6) Pteridophytes have well developed roots, stems and leaves.
(7) Pteridophytes reproduce with the help of spores formed along the back or posterior surface of their leaves.
(8) Nephrolepis belongs to division Pteridophyta.
(9) Depending upon whether seeds are enclosed in a fruit or not, phanerogams are classified into monocots and dicots.
(10) Gymnosperms are mostly evergreen, perennial and woody.
(11) Gymnosperms bear male and female flowers on different sporophylls of different plants.
(12) In Angiosperms, the seeds are covered by fruits.
(13) Dicotyledonous plants show reticulate venation.
(14) Moncotyledonous plants have trimerous flowers.
(15) In dicotyledonous plants, the stem is strong and hard.
Answer:
(1) False. Thallophyta plants grow mainly in water.
(2) False. Fungi like yeasts and moulds are included in division thallophyta.
(3) True
(4) False. Bryophyta do not have specialised tissuesfor conduction of food and water.
(5) False. Plants belonging to thallophyta group may be unicellular or multicellular.
(6) True
(7) True
(8) True
(9) False. Depending whether seeds are enclosed in. a fruit or not, angiosperms are classified into monocots and dicots.
(10) True
(11) False. Gymnosperms bear male and female flowers on different sporophylls of the same plant.
(12) True
(13) False. Dicotyledonous plants show parallel venation.
(14) True
(15) True.
In simple words: This section clarifies common misconceptions about plant classification, covering characteristics of Thallophyta, Bryophyta, Pteridophyta, Gymnosperms, and Angiosperms regarding their habitat, reproductive methods, tissue complexity, and seed structure.

🎯 Exam Tip: Pay close attention to the specific distinguishing features of each plant division, especially for false statements, as corrections test precise knowledge.

 

Give name

Question 1. What are ornamental plants are called?
Answer: Ferns
In simple words: Ferns are a common type of plant used for decoration.

🎯 Exam Tip: Remembering common examples for plant groups is helpful for identification questions.

 

Question 2. Plants with two cotyledons are called.
Answer: Dicots
In simple words: Plants whose seeds contain two embryonic leaves are known as dicots.

🎯 Exam Tip: The number of cotyledons is a key characteristic for classifying flowering plants.

 

Question 3. Plants with single cotyledon are called.
Answer: Monocots
In simple words: Plants whose seeds contain one embryonic leaf are known as monocots.

🎯 Exam Tip: This is a fundamental distinction alongside dicots in angiosperm classification.

 

Question 4. Type of venation showed by hibiscus plant leaves
Answer: Reticulate venation
In simple words: Hibiscus leaves have a net-like pattern of veins, characteristic of reticulate venation.

🎯 Exam Tip: Leaf venation patterns are a reliable indicator for distinguishing monocots from dicots.

 

Question 5. Type of venation showed by lily plant leaves
Answer: Parallel venation
In simple words: Lily leaves have veins running parallel to each other, which is typical for parallel venation.

🎯 Exam Tip: Understand that parallel venation is characteristic of monocotyledonous plants.

 

One line answers

Question 1. Which plants are mostly evergreen, perennial and woody?
Answer: Gymnosperms are mostly evergreen, perennial and woody.
In simple words: Gymnosperms are typically long-lived, tree-like plants that keep their leaves year-round.

🎯 Exam Tip: Remember these general growth characteristics for gymnosperms as they help in broad classification.

 

Question 2. Which type of venation showed by dicot plants?
Answer: Leaves of dicot plants show reticulated venation.
In simple words: Dicot plants have a network of veins in their leaves.

🎯 Exam Tip: Reticulate venation is a defining feature of dicotyledonous plants.

 

Question 3. Which type of venation showed by monocot plants?
Answer: Leaves of monocot plants show parallel venation
In simple words: Monocot plants have veins in their leaves that run side-by-side without much branching.

🎯 Exam Tip: Parallel venation is a key characteristic to identify monocots.

 

Question 4. How are angiosperms classified into monocot and dicot?
Answer: Depending whether seeds and enclosed in fruit or not, angiosperms are classified into monocot and dicot
In simple words: Angiosperms are divided into monocots and dicots based on whether their seeds have one or two embryonic leaves.

🎯 Exam Tip: The number of cotyledons (embryonic leaves) in the seed is the primary criterion for this sub-classification.

 

Question 5. In which division are fungi like moulds and yeast classified?
Answer: Fungi like moulds and yeast classified in division thallophyta.
In simple words: Fungi, including molds and yeasts, are grouped under Thallophyta because they have simple, undifferentiated plant bodies.

🎯 Exam Tip: Remember that Thallophyta includes simple forms like algae and fungi due to their lack of complex tissue differentiation.

 

Question 6. Plants belonging to which group may be unicellular or multicellular?
Answer: Plants belonging to thallophyta group may be unicellular or multicellular
In simple words: The Thallophyta group contains organisms that can exist as single cells or as many-celled structures.

🎯 Exam Tip: This wide range of cellular organization is a key feature of the diverse Thallophyta division.

 

Give scientific reason

Question 1. Thallophyta plants have thin and fibre like body
Answer: Thallophyta: These plants grow mainly in water i.e. fresh water as well as in saline water, therefore they usually have a soft and fibre-like (filamentous) body.
In simple words: Thallophytes, growing primarily in water, have soft, filamentous bodies adapted for aquatic life.

🎯 Exam Tip: Relate the plant's physical structure to its environment; aquatic plants often have flexible bodies.

 

Question 2. Bryophyta plants are called the amphibian plants.
Answer: Bryophyta: They grow in moist soil but need water for reproduction. Therefore, they are called 'amphibians of plant kingdom'.
In simple words: Bryophytes are called amphibians because they live on land but still depend on water for their reproduction, similar to amphibians that live on both land and water.

🎯 Exam Tip: The "amphibian" label is crucial for bryophytes; connect it directly to their dual requirement of land habitation and water for reproduction.

 

Question 3. Gymnosperms bear their male and female flowers on different sporophylls of the same plant
Answer: Gymnosperms: As these plants do not take the assistance of pollinators i.e. vectors, the male and female flowers are present on the different sporophyll of the same plant for successful fertilisation.
In simple words: Gymnosperms have male and female reproductive structures (flowers or cones) on separate parts of the same plant to facilitate successful fertilization without relying on external animal pollinators.

🎯 Exam Tip: Understanding the placement of reproductive organs in gymnosperms is important for explaining their reproductive strategy.

 

Write note on

Question 1. August W. Eichler
Answer: In 1883, Eichler, a botanist, classified the Kingdom Plantae into two subkingdoms. As a result, two subkingdoms, cryptogams and phanerogams were considered for plant classification.
In simple words: August W. Eichler was a botanist who, in 1883, introduced a plant classification system that divided the plant kingdom into two main subkingdoms: cryptogams and phanerogams.

🎯 Exam Tip: Remember Eichler's contribution as a key figure in establishing the cryptogam-phanerogam classification framework for plants.

 

Question 2. Thallophyta
Answer: These plants grow mainly in water. This group of plants, which do not have specific parts like root-stem-leaves-flowers but are autotrophic due to the presence of chlorophyll, is called algae. Algae show great diversity. They may be unicellular or multicellular, and microscopic or large. Examples of algae are Spirogyra, Ulothrix, Ulva, Sargassum, etc. Some of these are found in fresh water while some are found in saline water. These plants usually have a soft and fibre-like body. Various types of fungi like yeasts and moulds which do not have chlorophyll are also included in this group.
In simple words: Thallophyta are simple, aquatic plants (algae) or non-chlorophyllous organisms (fungi) that lack true roots, stems, or leaves, showing diverse forms from microscopic unicellular to large multicellular structures.

🎯 Exam Tip: Highlight the absence of differentiated plant parts, aquatic habitat, and inclusion of both autotrophic (algae) and heterotrophic (fungi) forms when describing Thallophyta.

 

Question 3. Bryophyta
Answer: This group of plants is called the amphibians' of the plant kingdom because they grow in moist soil but need water for reproduction. These plants are thalloid, multicellular and autotrophic. They reproduce by spore formation. The structure of the plant body of bryophytes is flat, ribbon-like long, without true roots, stem and leaves. Instead, they have stem-like or leaf-like parts and root-like rhizoids. They do not have specific tissues for conduction of food and water. Examples are Moss (Funaria), Marchantia, Anthoceros, Riccia, etc.
In simple words: Bryophytes are non-vascular "amphibian" plants that grow in moist soil, reproduce via spores, and have simple, thalloid bodies with rhizoids instead of true roots.

🎯 Exam Tip: Emphasize "amphibians of the plant kingdom," lack of true roots/stems/leaves, and reproduction by spores as key characteristics of Bryophyta.

 

Question 4. Pteridophyta
Answer: Plants from this group have well developed roots, stem and leaves and separate tissues for conduction of food and water. But, they do not bear flowers and fruits. They reproduce with the help of spores formed along the back or posterior surface of their leaves. Examples are ferns like Nephrolepis, Marsilea, Pteris, Adiantum, Equisetum, Selaginella, Lycopodium, etc. These plants reproduce asexually by spore-formation and sexually by zygote formation. They have a well-developed conducting system.
In simple words: Pteridophytes are vascular plants with true roots, stems, and leaves but reproduce by spores, not seeds, and exhibit both asexual (spore-formation) and sexual (zygote formation) reproduction.

🎯 Exam Tip: Note the presence of true vascular tissues, differentiated body parts, and spore reproduction as key features distinguishing Pteridophyta.

 

Question 5. Phanerogams
Answer: Plants which have special structures for reproduction and produce seeds are called phanerogams. In these plants, after the process of reproduction, seeds are formed which contain the embryo and stored food. During germination of the seed, the stored food is used for the initial growth of the embryo. Depending upon whether seeds are enclosed in a fruit or not, phanerogams are classified into gymnosperms and angiosperms.
In simple words: Phanerogams are seed-producing plants, characterized by visible reproductive structures and seeds containing an embryo and stored food, further divided into gymnosperms (naked seeds) and angiosperms (fruit-enclosed seeds).

🎯 Exam Tip: The defining feature of Phanerogams is seed production, which enables greater reproductive success and dispersal.

 

Question 6. Gymnosperms
Answer: Gymnosperms are mostly evergreen, perennial and woody. Their stems are without branches. The leaves form a crown. These plants bear male and female flowers on different sporophylls of the same plant. Seeds of these plants do not have natural coverings, i.e. these plants do not form fruits and are therefore called gymnosperms. (gymnos: naked, sperms: seeds). Examples Cycas, Picea (Christmas tree), Thuja (Morpankhi), Pinus (Deodar), etc.
In simple words: Gymnosperms are evergreen, woody trees with unbranched stems forming a crown of leaves, producing 'naked' seeds on sporophylls, not enclosed in fruits.

🎯 Exam Tip: Key points for gymnosperms include "naked seeds," evergreen nature, and male/female sporophylls on the same plant.

 

Question 7. Angiosperms
Answer: The flowers these plants bear are their reproductive organs. Flowers develop into fruits and seeds are formed within fruits. Thus, these seeds are covered; hence, they are called angiosperms (angios: cover, sperms: seeds). The plants whose seeds can be divided into two equal halves or dicotyledons are called dicotyledonous plants and those whose seeds cannot be divided into equal parts are called monocotyledonous plants.
In simple words: Angiosperms are flowering plants where seeds are enclosed within fruits, and they are further classified into monocotyledons (single cotyledon) and dicotyledons (two cotyledons).

🎯 Exam Tip: Focus on the "seeds enclosed in fruits" and the sub-classification into monocots and dicots as essential features of angiosperms.

 

Complete the flow chart.

Question 1. Living Organisms

ℹ️ चित्र व्याख्या (Diagram Explanation): यह आरेख सजीवों के वर्गीकरण को दर्शाता है, जिसमें उन्हें प्रोकैरियोटिक और यूकेरियोटिक में बांटा गया है। यूकेरियोटिक को आगे एककोशिकीय और बहुकोशिकीय में विभाजित किया गया है, और बहुकोशिकीय को कोशिका भित्ति वाले (जैसे प्लांटे और फंगी) और कोशिका भित्ति रहित (एनीमेलिया) में वर्गीकृत किया गया है।

 

Answer:

ℹ️ चित्र व्याख्या (Diagram Explanation): यह आरेख सजीवों के वर्गीकरण को विस्तार से दर्शाता है। इसमें सजीवों को पहले प्रोकैरियोटिक (मोनेरा) और यूकेरियोटिक में बांटा गया है। यूकेरियोटिक को फिर एककोशिकीय (प्रोटिस्टा) और बहुकोशिकीय में विभाजित किया गया है। बहुकोशिकीय जीवों को आगे कोशिका भित्ति वाले (स्वपोषी - प्लांटे और परपोषी - फंगी) और कोशिका भित्ति रहित (एनीमेलिया) में वर्गीकृत किया गया है।In simple words: The flowchart illustrates the hierarchical classification of living organisms, starting from Prokaryotic and Eukaryotic, then branching based on cellularity (unicellular/multicellular) and presence/absence of cell walls, leading to kingdoms like Monera, Protista, Fungi, Plantae, and Animalia.

🎯 Exam Tip: Understanding this foundational flowchart is critical for grasping the broad categories of biological classification.

 

Question 2. Kingdom: Plantae

ℹ️ चित्र व्याख्या (Diagram Explanation): यह आरेख प्लांटी जगत के वर्गीकरण को दर्शाता है, जिसमें इसे क्रिप्टोगैम्स और फ़ैनरोगैम्स में विभाजित किया गया है। क्रिप्टोगैम्स को आगे ब्रायोफाइटा में और फ़ैनरोगैम्स को एंजियोस्पर्म्स में बांटा गया है। एंजियोस्पर्म्स को फिर डाइकोटाइलडॉन में वर्गीकृत किया गया है।

 

Answer:

ℹ️ चित्र व्याख्या (Diagram Explanation): यह आरेख प्लांटी जगत के वर्गीकरण को विस्तृत रूप से दर्शाता है। इसमें प्लांटी को दो मुख्य उपजगों- क्रिप्टोगैम्स और फ़ैनरोगैम्स- में विभाजित किया गया है। क्रिप्टोगैम्स को थैलोफाइटा, ब्रायोफाइटा और टेरिडोफाइटा में बांटा गया है। फ़ैनरोगैम्स को जिम्नोस्पर्म्स और एंजियोस्पर्म्स में विभाजित किया गया है, और एंजियोस्पर्म्स को डाइकोटाइलडॉन और मोनोकोटाइलडॉन में आगे वर्गीकृत किया गया है।In simple words: This flowchart details the classification within the Kingdom Plantae, showing its division into Cryptogams (Thallophyta, Bryophyta, Pteridophyta) and Phanerogams (Gymnosperms, Angiosperms), with Angiosperms further split into Dicotyledons and Monocotyledons.

🎯 Exam Tip: This plant classification flowchart is fundamental; memorize the hierarchical divisions and sub-divisions thoroughly.

 

Distinguish between:

Question 1. Bryophyta and Pteridophyta:
Answer:

Bryophyta	Pteridophyta
Bryophytes grow in soil but need water for reproduction.	Pteridophytes grow in soil.
Plant body is without specific parts like true roots, stem and leaves.	Plant body is differentiated into true roots, stem and leaves.
Conducting tissues for food and water absent.	Conducting tissues for food and water present.
Examples: Moss (Funaria), Marchantia, Anthoceros, etc.	Examples: Nephrolepis, Marsilea, Pteris, Adiantum, Lycopodium etc.

In simple words: Bryophytes are non-vascular plants lacking true roots and stems, requiring water for reproduction, while Pteridophytes are vascular plants with differentiated roots, stems, and leaves that also grow in soil.

🎯 Exam Tip: Key distinctions are the presence of true roots/stems/leaves and conducting tissues, which mark a significant evolutionary step for Pteridophyta over Bryophyta.

 

Question 2. Angiosperms and Gymnosperms.
Answer:

Angiosperms	Gymnosperms
(i) In Angiosperms, the stems have branches.	(i) In Gymnosperms, the stems are without branches.
(ii) Reproductive organs are flowers.	(ii) Reprodcutive organs are cones.
(iii) Seeds are enclosed in natural coverings, i.e., fruits.	(iii) Seeds are not enclosed in natural coverings.
(iv) Examples: Mango, Bamboo, etc.	(iv) Examples: Cycas, Picea etc.

In simple words: Angiosperms have branched stems, flowers as reproductive organs, and seeds enclosed within fruits, whereas gymnosperms have unbranched stems, cones, and "naked" seeds.

🎯 Exam Tip: Focus on the presence/absence of branches, type of reproductive organ, and seed covering as primary distinguishing features.

 

Question 3. Cryptogams and Phanerogams.
Answer:

Cryptogams	Phanerogams
(iii) Their reproductive organs are hidden.	(iii) Their reproductive organs are exposed.
(iii) They reproduce by forming spores.	(iii) They reproduce by forming seeds.
(iii) They are less evolved plants.	(iii) They are highly evolved plants.
(iv) They are divided into Thallophyta, Bryophyta, Pteridophyta.	(iv) They are divided into Gymnosperms and Angiosperms.

In simple words: Cryptogams have hidden reproductive organs and reproduce by spores, representing less evolved plants, while Phanerogams have exposed reproductive organs and reproduce by seeds, classifying them as more highly evolved plants.

🎯 Exam Tip: The visibility of reproductive organs and the mode of reproduction (spores vs. seeds) are the fundamental criteria for distinguishing cryptogams from phanerogams.

 

Distinguish between:

Question 1. Thallophyta
Answer: Spirogvra, Ulothrix, Ulva, Sargassum
In simple words: Thallophyta refers to simple plant forms like Spirogyra, Ulothrix, Ulva, and Sargassum, which lack differentiated stems, roots, or leaves.

🎯 Exam Tip: Listing multiple examples helps solidify understanding of the diversity within the Thallophyta group.

 

Question 2. Bryophyta
Answer: Moss (Funaria), Marchantia, Anthoceros, Riccia
In simple words: Bryophyta includes non-vascular plants like Moss (Funaria), Marchantia, Anthoceros, and Riccia, often found in moist environments.

🎯 Exam Tip: Associate these specific examples with the Bryophyta group for better recall.

 

Question 3. Pteridophyta
Answer: Nephrolepis, Marsilea, Pteris, Adiantum, Equisetum, Selaginella, Lycopodium
In simple words: Pteridophyta encompasses vascular plants such as ferns (Nephrolepis, Marsilea, Pteris, Adiantum) and their relatives (Equisetum, Selaginella, Lycopodium), which reproduce by spores.

🎯 Exam Tip: Knowing diverse examples within Pteridophyta, beyond just ferns, shows a comprehensive understanding.

 

Question 4. Gymnosperms
Answer: Cycas, Picca (Christmas tree), Thuja (Morpankhi), Pinus (Deodar)
In simple words: Gymnosperms are seed-producing plants like Cycas, Christmas tree, Thuja, and Pinus, characterized by their "naked" seeds.

🎯 Exam Tip: Examples are crucial for cementing the concept of "naked seeds" in gymnosperms.

 

Question 5. Angiosperms
Answer: Tamarind, Mango, Apple, Lemon
In simple words: Angiosperms are flowering plants that produce fruits, such as Tamarind, Mango, Apple, and Lemon.

🎯 Exam Tip: Relating common fruit-bearing plants to angiosperms helps in practical application of the concept.

 

Question 6. Monocot plants
Answer: Bamboo, bananas, corn, daffodils, garlic, ginger, grass, lilies, onions, orchids, rice, sugarcane, tulips, and wheat
In simple words: Monocot plants include a wide variety of species like grasses, corn, rice, and lilies, all characterized by a single cotyledon in their seeds.

🎯 Exam Tip: Familiarize yourself with a range of common monocot examples for diverse identification scenarios.

 

Question 7. Dicot plants
Answer: Rose, sunflower, grapes, strawberries, tomatoes, peas, peanuts and potatoes
In simple words: Dicot plants include diverse species such as roses, sunflowers, grapes, and peas, all having two cotyledons in their seeds.

🎯 Exam Tip: Knowing a broad list of dicot examples reinforces the concept of two embryonic leaves.

 

Observe the figure and answer the questions

1. Dicot Plants

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक सामान्य द्विबीजपत्री पौधे को दर्शाता है, जिसमें उसकी जड़ प्रणाली, तना, पत्तियां (जो जालिकादार शिरा-विन्यास दिखा रही हैं), और फूल स्पष्ट रूप से प्रदर्शित हैं। यह द्विबीजपत्री पौधों की विशिष्ट शारीरिक विशेषताओं को उजागर करता है।

Question 1. What are the characteristics of the above plants in terms of root system?
Answer: Well developed, primary root (Tap root)
In simple words: Dicot plants have a strong, main taproot with smaller side roots.

🎯 Exam Tip: A taproot system is a key distinguishing feature of dicotyledonous plants.

 

Question 2. What are the characteristics of the above plants in terms of flowers?
Answer: Flowers with 4 or 5 parts or in their multiples (tetramerous or pentamerous)
In simple words: Dicot flowers typically have petals in groups of four or five, or multiples of these numbers.

🎯 Exam Tip: The number of floral parts (merosity) is an important criterion for classifying flowering plants.

 

Question 3. What are the characteristics of the above plants in terms of leaf venations?
Answer: Reticulate Venation
In simple words: Dicot leaves have a net-like pattern of veins.

🎯 Exam Tip: Reticulate venation is a characteristic feature of dicotyledonous leaves.

 

Question 4. What are the characteristics of the above plants in terms of type of stem?
Answer: Strong and hard
In simple words: Dicot plants generally have sturdy and firm stems.

🎯 Exam Tip: Stem characteristics, like hardness, can sometimes aid in plant classification, but are less definitive than other features.

 

Question 5. What are the characteristics of the above plants in terms of seed?
Answer: Two cotyledons
In simple words: Dicot seeds contain two embryonic leaves, or cotyledons.

🎯 Exam Tip: The presence of two cotyledons is the defining feature of dicot plants.

 

Question 6. Give example of the following types of plants
Answer: Rose, sunflower, grapes, strawberries, tomatoes, peas, peanuts and potatoes
In simple words: Examples of dicot plants include common garden and food plants like roses, sunflowers, and peas.

🎯 Exam Tip: Provide a diverse list of common examples to demonstrate comprehensive understanding.

 

2. Monocot Plants

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक सामान्य एकबीजपत्री पौधे को दर्शाता है, जिसमें उसकी रेशेदार जड़ प्रणाली, तना, पत्तियां (जो समानांतर शिरा-विन्यास दिखा रही हैं), और फूल स्पष्ट रूप से प्रदर्शित हैं। यह एकबीजपत्री पौधों की विशिष्ट शारीरिक विशेषताओं को उजागर करता है।

Question 1. What are the characteristics of the above plants in terms of root system?
Answer: Fibrous roots
In simple words: Monocot plants have a root system made of many thin, fibrous roots.

🎯 Exam Tip: A fibrous root system is a primary indicator of monocotyledonous plants.

 

Question 2. What are the characteristics of the above plants in terms of flowers?
Answer: Flowers with 3 parts or in multiples of three (trimerous).
In simple words: Monocot flowers usually have petals in groups of three, or multiples of three.

🎯 Exam Tip: Trimerous flowers are a consistent and reliable feature for identifying monocot plants.

 

Question 3. What are the characteristics of the above plants in terms of leaf venations?
Answer: Parallel Venation
In simple words: Monocot leaves have veins that run parallel to each other.

🎯 Exam Tip: Parallel venation is a distinctive characteristic of monocotyledonous leaves.

 

Question 4. What are the characteristics of the above plants in terms of type of stem?
Answer: Hollow, False or Disc-like
In simple words: Monocot stems can be hollow (like bamboo), appear false (like banana), or be disc-like (like onion).

🎯 Exam Tip: Recognize the varied forms of monocot stems, which differ significantly from dicot stems.

 

Question 5. What are the characteristics of the above plants in terms of seed?
Answer: Single cotyledons
In simple words: Monocot seeds contain only one embryonic leaf, or cotyledon.

🎯 Exam Tip: The presence of a single cotyledon is the defining feature of monocot plants.

 

Question 6. Give example of the following types of plants
Answer: Bamboo, bananas, corn, daffodils, garlic, ginger, grass, lilies, onions, orchids, rice, sugarcane, tulips, and wheat
In simple words: Common monocot plants include cereals like corn and rice, and many flowering plants such as lilies and orchids.

🎯 Exam Tip: Include both agricultural and ornamental examples to show a broad understanding of monocots.

 

3. Spirogyra

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र स्पाइरोगाइरा की एक सूक्ष्मदर्शीय संरचना को दर्शाता है, जिसमें इसकी कोशिका भित्ति, केंद्रक, पाइरीनॉइड और विशिष्ट सर्पिलाकार क्लोरोप्लास्ट (हरे रंग की सर्पिल पट्टियाँ) स्पष्ट रूप से दिख रहे हैं। यह इसकी रेशेदार, फिलामेंटस प्रकृति को भी उजागर करता है।

Question 1. Which division of plants does this plant come under?
Answer: This plant come under Division I Thallophyta.
In simple words: Spirogyra is classified as a Thallophyta because it has a simple, undifferentiated body without true roots, stems, or leaves.

🎯 Exam Tip: Link Spirogyra directly to Thallophyta due to its lack of complex plant structures.

 

Question 2. Where does this plant grow?
Answer: These plants grow mainly in water.
In simple words: Spirogyra predominantly grows in aquatic environments, especially in freshwater.

🎯 Exam Tip: Remember the aquatic habitat as a key characteristic of Spirogyra and many other thallophytes.

 

Question 3. Are these types of plants unicellular or multicellular?
Answer: They may be unicellular or multicellular and microscopic or large.
In simple words: Spirogyra can vary in size and cellular complexity, existing as either single cells or multiple cells, and can be microscopic or larger.

🎯 Exam Tip: The diversity in cellular organization (unicellular or multicellular) is a general feature across the Thallophyta division.

 

4. Funaria

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र फ्यूनारिया पौधे को दर्शाता है, जिसमें इसकी पत्ती जैसे भाग, तना और जड़ों जैसे राइजॉइड स्पष्ट रूप से दिखाए गए हैं। यह ब्रायोफाइटा समूह का एक विशिष्ट उदाहरण है, जो नम मिट्टी में उगता है।

Question 1. Which division of plants does this plant come under?
Answer: This plant come under Division II Bryophyta.
In simple words: Funaria belongs to the Bryophyta division of the plant kingdom.

🎯 Exam Tip: Remember the classification of Funaria as a Bryophyte due to its simple plant body and dependence on moist environments.

 

Question 2. Where does this plant grow?
Answer: They grow in moist soil but need water for reproduction.
In simple words: Funaria thrives in damp soil but requires water to complete its reproductive cycle.

🎯 Exam Tip: Note that 'amphibious' nature is a key characteristic for Bryophytes, requiring both land (moist soil) and water for survival and reproduction.

 

Question 3. What are these group of plants called in the plant kingdom?
Answer: This group of plants is called the 'amphibians' of the plant kingdom.
In simple words: Bryophytes are known as the amphibians of the plant kingdom because they live on land but need water for reproduction.

🎯 Exam Tip: Highlighting the 'amphibian' nature of Bryophytes is crucial for understanding their ecological niche and reproductive strategy.

 

Question 4. Are these types of plant autotropic?
Answer: They reproduce by spore formation.
In simple words: Bryophytes are autotrophic, meaning they produce their own food, but their reproduction occurs through spores.

🎯 Exam Tip: Distinguish between mode of nutrition (autotrophic) and mode of reproduction (spore formation) when describing Bryophytes.

 

Question 5. Do these plants have root-stem-leaves-flowers system?
Answer: The structure of the plant body of bryophytes is flat, ribbon-like long, without true roots, stem and leaves.
In simple words: Bryophytes have a simple plant body that is flat and ribbon-like, lacking true roots, stems, or leaves.

🎯 Exam Tip: Focus on the undifferentiated plant body structure of Bryophytes as a distinguishing feature from more evolved plants.

 

Question 6. What do these plants have instead of roots?
Answer: They have root like rhizoids.
In simple words: Instead of true roots, Bryophytes possess rhizoids, which anchor them to the substrate.

🎯 Exam Tip: Emphasize the function of rhizoids for attachment rather than absorption, unlike true roots.

 

5. Fern

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक फ़र्न पौधे को दिखाता है, जिसमें इसकी अच्छी तरह से विकसित जड़ें, तना और पत्तियां दिखाई गई हैं। फ़र्न टेरिडोफाइटा समूह से संबंधित हैं और पत्तियों के नीचे या पीछे की सतह पर बीजाणुओं द्वारा प्रजनन करते हैं।

Question 1. Which division of plants does this plant come? under?
Answer: This plant come under Division III Pteridophyta.
In simple words: Ferns belong to the Pteridophyta division of the plant kingdom.

🎯 Exam Tip: Accurately identifying the division Pteridophyta for ferns is a fundamental classification point.

 

Question 2. Where does this plant grow?
Answer: They grow in soil.
In simple words: Ferns typically grow in soil, often in moist and shaded environments.

🎯 Exam Tip: Recognize that while ferns grow in soil, they still require some moisture for successful reproduction.

 

Question 3. How do these plants reproduce?
Answer: These plants reproduce asexually by spore- formation and sexually by zygote formation.
In simple words: Ferns reproduce both asexually through spores and sexually through the formation of a zygote, exhibiting alternation of generations.

🎯 Exam Tip: Understanding the dual reproductive modes (spore formation and zygote formation) is key to describing Pteridophytes.

 

Question 4. Do these plants produce flowers and fruits?
Answer: They do not bear flowers and fruits.
In simple words: Ferns do not produce flowers or fruits, as they are non-flowering plants.

🎯 Exam Tip: It's important to remember that Pteridophytes are seedless vascular plants, hence no flowers or fruits.

 

Question 5. Do these plants have root-stem-leaves-flowers system?
Answer: Plants from this group have well developed roots, stem and leaves and separate tissues for conduction of food and water.
In simple words: Ferns possess a well-developed system of true roots, stems, and leaves, along with specialized vascular tissues for transport.

🎯 Exam Tip: Focus on the presence of true roots, stem, and leaves, and vascular tissues as key evolutionary advancements in Pteridophytes.

 

Question 6. Where are the spores formed in the plants body?
Answer: The spores formed along the back or posterior surface of their leaves.
In simple words: Fern spores are typically found on the underside or back surface of their leaves.

🎯 Exam Tip: Knowing the location of spore formation (sori on leaves) is a specific detail for identifying Pteridophytes.

 

6. Cycas

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक साइकस पौधे को दर्शाता है, जो अपने ताड़ जैसे पत्तों और मोटे तने के साथ एक जिम्नोस्पर्म का उदाहरण है। साइकस के तने में शाखाएँ नहीं होतीं और पत्तियाँ एक मुकुट का आकार लेती हैं।

Question 1. Which division of plants does this plant come under?
Answer: This plant come under Division III Phanerogams Division I Gymnosperms.
In simple words: Cycas belongs to the Gymnosperms division, which is a sub-division of Phanerogams.

🎯 Exam Tip: Clearly state that Cycas is a Gymnosperm, falling under the larger group of Phanerogams.

 

Question 2. Explain structure of these types of plants?
Answer: Gymnosperms are mostly evergreen perennial and woody.
In simple words: Gymnosperms like Cycas are generally evergreen, perennial, and woody plants.

🎯 Exam Tip: Key structural features of Gymnosperms include their evergreen, perennial, and woody nature.

 

Question 3. How is stem and leaves of these types of plants?
Answer: Their stems are without branches and the leaves form a crown.
In simple words: Cycas plants have unbranched stems, and their leaves are arranged in a crown-like formation.

🎯 Exam Tip: Describe the unbranched stem and crown-like leaf arrangement as characteristic features of Cycas.

 

Question 4. Where are the male and female flowers located?
Answer: These plants bear male and female flowers on different sporophylls of the same plant.?
In simple words: Male and female reproductive structures (flowers/cones) in Cycas are borne on separate sporophylls on the same plant.

🎯 Exam Tip: Note that Gymnosperms have male and female reproductive structures on sporophylls, not true flowers, and they are typically borne on the same plant.

 

Question 6. Give some examples of these types of plants?
Answer: Rose, sunflower, grapes, strawberries, tomatoes, peas, peanuts and potatoes
In simple words: The provided examples are typically Angiosperms (flowering plants with covered seeds), while Cycas is a Gymnosperm (naked seeds). Common Gymnosperm examples include pines, firs, and cedars.

🎯 Exam Tip: Be careful to differentiate between Gymnosperms (like Cycas, pines, deodar) which have naked seeds and Angiosperms (like rose, sunflower) which have covered seeds and flowers. The given answer lists Angiosperms, not Gymnosperms.

 

7. Monocot and Dicot Plants

ℹ️ चित्र व्याख्या (Diagram Explanation): यह चित्र एक पौधे की सामान्य शारीरिक रचना को दर्शाता है जिसमें फूल, पत्ती, नोड, इंटर्नोड, तना और जड़ें शामिल हैं। यह मोनocot और डिकोट पौधों के बीच संरचनात्मक अंतरों को समझने के लिए एक बुनियादी संदर्भ प्रदान करता है।

Question 1. Which division of plants does this plant come under?
Answer: This plant come under Division III Phanerogams Division II Angiosperms
In simple words: Monocot and dicot plants are classified under Angiosperms, which are a part of the Phanerogams division.

🎯 Exam Tip: Understand that Angiosperms are further divided into Monocots and Dicots based on cotyledon number.

 

Question 2. How are the seeds of these types of planis?
Answer: The seeds are formed within fruits thus these seeds are covered
In simple words: In these plants, seeds are enclosed within fruits, meaning they are covered seeds.

🎯 Exam Tip: The defining characteristic of Angiosperms (which include monocots and dicots) is the presence of covered seeds within fruits.

 

Question 3. How can we classify the plants according to their seeds in this division?
Answer: The plants whose seeds can be divided into two equal halves or dicotyledons are called dicotyledonous plants and those whose seeds cannot be divided into equal parts are called monocotyledonous plants.
In simple words: Plants are classified into dicotyledons if their seeds have two equal halves, and monocotyledons if their seeds have only one cotyledon and cannot be split equally.

🎯 Exam Tip: The number of cotyledons (one or two) is the primary criterion for classifying Angiosperms into monocots and dicots.

 

Question 4. How the venations are present on the leaves of these types of plants?
Answer: These plants bear parallel or reticulated venations on the leaves.
In simple words: Monocots have parallel venation, while dicots exhibit reticulated (net-like) venation in their leaves.

🎯 Exam Tip: Leaf venation (parallel for monocots, reticulate for dicots) is an important distinguishing feature.

 

Question 5. How is the root system of these types of plants?
Answer: The root systems of these types of plant are tap roots or fibrous roots.
In simple words: Dicot plants typically have a taproot system, while monocot plants have a fibrous root system.

🎯 Exam Tip: Root system type (taproot vs. fibrous roots) is another key characteristic used to differentiate monocots and dicots.

 

Complete The Paragraph

Question 1. Thallophyta plants grow mainly in .................... This group of plants, which do not have specific parts like root-stem-leaves-flowers but are autotrophic due to the presence of ...................., is called algae. Algae show great diversity. They may be unicellular or ...................., and microscopic or large. Examples of algae are Spirogyra, Ulothrix, Ulva, Sargassum, etc. Some of these are found in fresh water while some are found in saline water. These plants usually have a .................... and fibre-like body. Various types of .................... like yeasts and moulds which do not have .................... are also included in this group.
Answer: Thallophyta plants grow mainly in water. This group of plants, which do not have specific parts like root-stem-leaves-flowers but are autotrophic due to the presence of chlorophyll, is called algae. Algae show great diversity. They may be unicellular or multicellular, and microscopic or large. Examples of algae are Spirogyra, Ulothrix, Ulva, Sargassum, etc. Some of these are found in fresh water while some are found in saline water. These plants usually have a soft and fibre-like body. Various types of fungi like yeasts and moulds which do not have chlorophyll are also included in this group.
In simple words: Thallophyta plants, mainly algae, grow in water, are autotrophic due to chlorophyll, can be unicellular or multicellular, have a soft and fibrous body, and include fungi which lack chlorophyll.

🎯 Exam Tip: Focus on the key characteristics of Thallophyta: aquatic habitat, autotrophic nature (algae), undifferentiated body, and the inclusion of fungi despite lacking chlorophyll.

 

Question 2. .................... group of plants is called the amphibians' of the plant kingdom because they grow in moist soil but need .................... for reproduction. These plants are thalloid, multicellular and autotrophic. They reproduce by .................... formation. The structure of the plant body of bryophytes is flat, ribbon-like long, without true ...................., stem and leaves. Instead, they have stem-like or leaf-like parts and root-like ..................... They do not have specific .................... for conduction of food and water.
Answer: Bryophyta group of plants is called the 'amphibians' of the plant kingdom because they grow in moist soil but need water for reproduction. These plants are thalloid, multicellular and autotrophic. They reproduce by spore formation. The structure of the plant body of bryophytes is flat, ribbon-like long, without true roots, stem and leaves. Instead, they have stem-like or leaf-like parts and root-like rhizoids. They do not have specific tissues for conduction of food and water. Examples are Moss (Funaria), Marchantia, Anthoceros, Riccia, etc.
In simple words: Bryophytes are called plant amphibians because they need moist soil and water for reproduction. They are thalloid, multicellular, autotrophic, reproduce by spores, and have a flat body with rhizoids instead of true roots, lacking specialized conducting tissues.

🎯 Exam Tip: Remember the 'amphibian' characteristic, thalloid body, spore reproduction, and absence of true roots/vascular tissues as essential points for Bryophyta.

 

Question 3. Plants from Pteridophyta group have well developed roots, stem and leaves and separate .................... for conduction of food and water. But, they do not bear .................... and ..................... They reproduce with the help of .................... formed along the back or posterior surface of their leaves. Examples are ferns like Nephrolepis, Marsilea, Pteris, Adiantum, Equisetum, Selaginella, Lycopodium, etc. These plants reproduce asexually by spore-formation and sexually by .................... formation. They have a well-developed conducting system.
Answer: Plants from Pteridophyta group have well developed roots, stem and leaves and separate tissues for conduction of food and water. But, they do not bear flowers and fruits. They reproduce with the help of spores formed along the back or posterior surface of their leaves. Examples are ferns like Nephrolepis, Marsilea, Pteris, Adiantum, Equisetum, Selaginella, Lycopodium, etc. These plants reproduce asexually by spore-formation and sexually by zygote formation. They have a well-developed conducting system.
In simple words: Pteridophytes have true roots, stems, leaves, and vascular tissues but lack flowers and fruits. They reproduce via spores (asexually) and zygotes (sexually), and possess a developed conducting system.

🎯 Exam Tip: Key features of Pteridophytes include true vascular organs, absence of flowers/fruits, and reproduction by both spores and zygotes.

 

Question 4. Phanerogams plants which have special structures for .................... and produce ..................... In these plants, after the process of reproduction, seeds are formed which contain the .................... and stored food. During germination of the seed, the stored food is used for the initial growth of the embryo. Depending upon whether seeds are enclosed in .................... a or not, phanerogams are classified into .................... and .....................
Answer: Phanerogams plants which have special structures for reproduction and produce seeds. In these plants, after the process of reproduction, seeds are formed which contain the embryo and stored food. During germination of the seed, the stored food is used for the initial growth of the embryo. Depending upon whether seeds are enclosed in a fruit or not, phanerogams are classified into gymnosperms and angiosperms.
In simple words: Phanerogams are seed-producing plants with specialized reproductive structures. Their seeds contain an embryo and stored food for initial growth. They are further categorized into Gymnosperms (naked seeds) and Angiosperms (seeds enclosed in fruit).

🎯 Exam Tip: Focus on seeds as the distinguishing feature of Phanerogams, and their division into Gymnosperms and Angiosperms based on seed covering.

 

Question 5. Gymnosperms are mostly ...................., perennial and woody. Their stems are without ..................... The leaves form a ..................... These plants bear male and female flowers on different .................... of the same plant .................... of these plants do not have natural coverings, i.e. these plants do not form .................... and are therefore called gymnosperms. (gymnos: naked, sperms: seeds). Examples Cycas, Picea (Christmas tree), Thuja (Morpankhi), Pinus (Deodar), etc.
Answer: Gymnosperms are mostly evergreen, perennial and woody. Their stems are without branches. The leaves form a crown. These plants bear male and female flowers on different sporophylls of the same plant. Seeds of these plants do not have natural coverings, i.e. these plants do not form fruits and are therefore called gymnosperms. (gymnos: naked, sperms: seeds). Examples Cycas, Picea (Christmas tree), Thuja (Morpankhi), Pinus (Deodar), etc.
In simple words: Gymnosperms are evergreen, perennial, woody plants with unbranched stems and crown-like leaves. They bear male and female flowers on different sporophylls of the same plant and have naked seeds, meaning no fruits are formed.

🎯 Exam Tip: Key characteristics of Gymnosperms include their woody nature, unbranched stems, crown-like leaves, distinct sporophylls for reproduction, and the crucial feature of 'naked seeds'.

 

Question 6. The flowers of Angiosperms plants bear are their .................... organs Flowers develop into .................... and seeds are formed within ..................... Thus, these seeds are ....................; hence, they are called angiosperms (angios: cover, sperms: seeds). The plants whose seeds can be divided into two equal halves or dicotyledons are called .................... plants and those whose seeds cannot be divided into equal parts are called .................... plants.
Answer: The flowers of Angiosperms plants are their reproductive organs. Flowers develop into fruits and seeds are formed within fruits. Thus, these seeds are covered; hence, they are called angiosperms (angios: cover, sperms: seeds). The plants whose seeds can be divided into two equal halves or dicotyledons are called dicotyledonous plants and those whose seeds cannot be divided into equal parts are called monocotyledonous plants.
In simple words: Angiosperms have flowers as their reproductive organs, which develop into fruits containing covered seeds. These plants are further divided into dicotyledons (seeds split into two halves) and monocotyledons (seeds cannot be split).

🎯 Exam Tip: The presence of flowers, covered seeds within fruits, and classification into monocots and dicots based on cotyledon count are defining attributes of Angiosperms.

 

Answer The Questions In Detail:

Question 1. Write the characteristics of Thallophyta.
Answer:

• Thallophyta plants grow mainly in water.
• The group of plants, which do not have specific parts like root-stem-leaves-flowers but are autotrophic due to the presence of chlorophyll are called algae.
• Algae show great diversity They may be unicellular or multicellular and microscopic or large.
• Some of these are found in freshwater while some are found in saline water.
• Various types of fungi like yeasts and moulds which do not have chlorophyll are also included in this group.
• Examples: Spirogyra, Ulothrix, Ulva, etc.

In simple words: Thallophytes are mostly aquatic, lack true roots, stems, leaves, or flowers, are autotrophic (like algae with chlorophyll), can be unicellular or multicellular, and also include non-chlorophyllous fungi.

🎯 Exam Tip: Focus on the aquatic habitat, undifferentiated plant body (thallus), and diverse forms including both algae and fungi as key characteristics of Thallophyta.

 

Question 2. Write the characteristics of Gymnosperms.
Answer:

• Gymnosperms are mostly evergreen, perennial and woody.
• Their stems are without branches.
• The leaves form a crown.
• These plants bear male and female flowers on different sporophylls of the same plant.
• Seeds of these plants do not have natural coverings, i.e. these plants do not form fruits and are therefore called gymnosperms (gmnos: naked, sperms: seeds)
• Examples: Cycas, Picea (christmas tree), Thuja, Pinus (deodar), etc.

In simple words: Gymnosperms are evergreen, perennial, woody plants with unbranched stems and crown-shaped leaves. They produce male and female reproductive structures on separate sporophylls on the same plant, and crucially, their seeds are naked, not enclosed in fruits.

🎯 Exam Tip: Emphasize the evergreen, woody nature, unbranched stems, distinct male and female reproductive cones on sporophylls, and the defining feature of 'naked seeds' for Gymnosperms.

 

Make Concept Diagram

Question 1. Plant classification
Answer:
ℹ️ चित्र व्याख्या (Diagram Explanation): यह आरेख पौधों के वर्गीकरण को दर्शाता है। यह पौधों को मुख्य रूप से दो समूहों में विभाजित करता है: 'जो बीज नहीं बनाते' और 'जो बीज बनाते हैं'। 'जो बीज नहीं बनाते' समूह को आगे 'कोई वास्तविक जड़, तना या पत्तियां नहीं' (शैवाल) और 'कुछ जड़ें, तना या पत्तियां' (फर्न, मॉस) में बांटा गया है। 'जो बीज बनाते हैं' समूह को 'फूल नहीं' (जिम्नोस्पर्म - कोनिफर) और 'फूल' (एंजियोस्पर्म - सूरजमुखी) में विभाजित किया गया है।In simple words: This diagram illustrates plant classification into non-seed bearing plants (further categorized by absence/presence of roots, stems, or leaves like algae, ferns, mosses) and seed bearing plants (further categorized by absence/presence of flowers like conifers/gymnosperms, and sunflowers/angiosperms).

🎯 Exam Tip: Understand the hierarchical classification of plants based on key characteristics like seed formation, presence of true roots/stems/leaves, and flowers.

 

Question 2. Taxonomy of carnivorous plant
Answer:
ℹ️ चित्र व्याख्या (Diagram Explanation): यह आरेख एक मांसाहारी पौधे की टैक्सोनॉमी को डोमेन से प्रजाति तक दर्शाता है। इसमें डोमेन यूकेरिया, किंगडम प्लांटे, फाइलम एंथोफाइटा, क्लास मैगनोलिओप्सिडा, ऑर्डर कैरियोफाइलेलेस, फैमिली ड्रोसेरासी, जीनस डायोनिया और प्रजाति डायोनिया मस्कुसिपुला शामिल है। चित्र में डायोनिया मस्कुसिपुला (वीनस फ्लाईट्रैप) का एक उदाहरण भी दिखाया गया है।In simple words: This diagram shows the taxonomic classification of a carnivorous plant, specifically the Venus flytrap (Dionaea muscipula), detailing its hierarchy from Domain Eukarya down to its specific species.

🎯 Exam Tip: Be able to trace the taxonomic path of an organism from broad categories like Kingdom and Phylum down to Genus and Species.

 

Question 3. Taxonomy of mango plant
Answer:
ℹ️ चित्र व्याख्या (Diagram Explanation): यह आरेख मैंगिफेरा जीनस के तहत आम के पौधे की टैक्सोनॉमी को दर्शाता है, जिसमें संबंधित प्रजातियां जैसे M. applanata, M. macrocarpa, M. altissima, M. spp, M. laurina, M. kasturi, M. odorata और M. indica शामिल हैं। यह विभिन्न आम की प्रजातियों और उनके वर्गीकरण को समझने में मदद करता है।In simple words: This diagram illustrates the taxonomy of the mango plant, focusing on various species within the Mangifera genus, including the common Mangifera indica.

🎯 Exam Tip: Understanding how different species within a genus are categorized helps in grasping biodiversity and specific plant classifications.