Selina Concise Solutions for ICSE Class 6 Biology Chapter 2 The Flower

Multiple Choice Questions:

Put a tick mark (✓) against the correct alternative in the following statements:
 

Question (a): In a germinating seed, the roots develop from:
(i) Radicle
(ii) Plumule
(iii) Tegmen
(iv) Hilum

Answer: (i) Radicle
The radicle is the embryonic root and is the first part of the seed to emerge during germination. It grows downward into the soil to anchor the plant and absorb moisture.
Teacher's Tip: Use the letter "R" to remember: Radicle develops into the Root.
Exam Tip: In MCQs, read all options even if you find the answer early to ensure you haven't missed a more specific choice.

Question (b): In a germinating seed, the shoot develops from:
(i) Radicle
(ii) Plumule
(iii) Tegmen
(iv) Hilum

Answer: (ii) Plumule
The plumule is the part of the embryo that grows upward and develops into the stem and leaves. It contains the growing tip of the shoot and is responsible for the plant's height.
Teacher's Tip: Think of "P" for Plumule and "P" for the Part that grows up into the Plant shoot.
Exam Tip: Be careful not to confuse radicle and plumule; they represent the two opposite ends of the plant's axis.

Question (c): Which one of the following is a monocotyledonous seed ?
(i) Bean
(ii) Pea
(iii) Maize
(iv) Gram

Answer: (iii) Maize
Monocotyledonous seeds, like maize, have only one seed leaf (cotyledon) within the seed coat. These plants usually show parallel venation in their leaves when they grow.
Teacher's Tip: Most grains like corn, rice, and wheat are monocots.
Exam Tip: Remember that dicots usually split into two halves, while monocots do not.

Question (d): If the cotyledons are pushed above the soil, then such type of germination is called :
(i) Epigeal
(ii) Hypogeal
(iii) Perigeal
(iv) Progeal

Answer: (i) Epigeal
In epigeal germination, the hypocotyl elongates rapidly, carrying the cotyledons above the ground surface. These cotyledons often turn green and act as the first leaves for the seedling.
Teacher's Tip: "Epi" means above and "Geo" means ground, so "Epigeal" means above ground.
Exam Tip: Use the term "hypocotyl elongation" to explain how cotyledons are pushed up.

Question (e): If the cotyledons remain under the soil, then such seeds type of germination is called:
(i) Epigeal
(ii) Hypogeal
(iii) Perigeal
(iv) Progeal

Answer: (ii) Hypogeal
Hypogeal germination occurs when the epicotyl elongates, keeping the cotyledons buried beneath the soil. In this case, the cotyledons remain as a food source underground until they eventually shrivel.
Teacher's Tip: "Hypo" means below, so "Hypogeal" means the cotyledons stay below ground.
Exam Tip: Mention pea or gram as examples of plants showing hypogeal germination.

Question (f): Pollen is produced in the:
(i) Filament
(ii) Style
(iii) Pistil
(iv) Anther

Answer: (iv) Anther
The anther is the pollen-bearing part of the male reproductive organ (stamen) in a flower. It consists of pollen sacs where thousands of microscopic pollen grains are formed.
Teacher's Tip: The anther is like the "pollen factory" of the flower.
Exam Tip: Draw the stamen and clearly label the anther at the top of the filament.

Question (g): Reproductive whorls of a flower are:
(i) Stamens and carpels
(ii) Sepals and petals
(iii) Sepals and stamens
(iv) Petals and carpels

Answer: (i) Stamens and carpels
Stamens are the male parts and carpels are the female parts necessary for sexual reproduction in plants. The other whorls, sepals and petals, are called accessory whorls because they help but aren't directly involved in making seeds.
Teacher's Tip: Think of reproductive whorls as the "essential" parts for making the next generation of plants.
Exam Tip: Use the scientific names "Androecium" and "Gynoecium" to describe these whorls in long answers.

PQ: Vegetative propagation is not observed in:
(i) Potato
(ii) Tomato
(iii) Pea
(iv) Bean

Answer: (ii) Tomato
Vegetative propagation involves growing new plants from roots, stems, or leaves rather than seeds. While potatoes grow from tubers, tomatoes are primarily grown through the sexual reproduction process using seeds found in their fruit.
Teacher's Tip: Vegetative propagation creates a "clone" of the parent plant without using seeds.
Exam Tip: Note that "PQ" likely stands for "Practice Question" in your textbook.

Question  (h): Which one of the following is a false fruit ?
(i) Tomato
(ii) Apple
(iii) Potato
(iv) Pea

Answer: (ii) Apple
A false fruit develops from parts of the flower other than the ovary, such as the thalamus. In an apple, the fleshy part we eat is actually the swollen thalamus, while the core is the true fruit.
Teacher's Tip: Most common fruits are "true," but apples and strawberries are famous "false" ones.
Exam Tip: Define "thalamus" as the base of the flower to explain where false fruits come from.

Question (i): In a seed, food is generally stored in:
(i) Radicle
(ii) Plumule
(iii) Fruit
(iv) Catyledons or endosperms

Answer: (iv) Catyledons or endosperms
Seeds need a built-in food supply to provide energy until the plant can start photosynthesis. This food is stored as starch, proteins, or fats in either the cotyledons (in beans) or the endosperm (in maize).
Teacher's Tip: Cotyledons are like a "packed lunch" for the baby plant.
Exam Tip: Be sure to correctly spell "Cotyledons" as it is a common technical term in biology.

Question 1: Given below is a longitudinal section of a bean seed. Label the parts marked 1 to 5 and write their functions.
Answer:
1. Testa (seed coat)
2. Plumule
3. Radicle
4. Micropyle
5. Cotyledon
1. Testa (seed coat) - It protects the seed from insects and bacteria as well as from mechanical injury.
2. Plumule - Plumule develops into a shoot.
3. Radicle - Radicle develops into a root
4. Micropyle - The micropyle absorbs as much water as is required for germination.
5. Cotyledon - Contain stored food material which is used by the seeding during germination.

(As provided in the textbook verbatim above)
Understanding the anatomy of a seed reveals how life is preserved in a dormant state. Each structure, from the protective coat to the tiny embryo, has a vital role in ensuring a successful start for the new plant.
Teacher's Tip: Think of a seed as a "space capsule" containing an astronaut (embryo) and all his supplies (cotyledon) in a protective shell (testa).
Exam Tip: Always draw and label diagrams with pencil and use ink only for writing the functions.

Question 2: Name the following:
(a) A seed which shows hypogeal germination.
Ans. pea seed, maize. seed
(b) Amonocotseed.
Ans. Maize seed, wheat seed
(c) A dicot seed.
Ans. Bean seed, gram seed, pea seed
(d) A seed which shows epigeal germination.
Ans. Bean seed castor seed, tamarind seed

Answer: (As provided in the textbook verbatim above)
These examples illustrate the diversity in plant reproduction and development strategies. Recognizing these specific seeds helps in identifying the growth patterns of different plant families in agricultural science.
Teacher's Tip: Grains are usually monocots, while beans and peas are usually dicots.
Exam Tip: Give at least two examples for each category to show a better grasp of the subject.

Question 3: Differentiate between the following pairs of terms:
(a) Radicle and plumule.
Answer:
Radicle: In a seed the radicle lies downwards near the lower pointed end of the grain. It gives rise to the root.
Plumule: In a seed the plumule lies upwani near the cotyledon and gives rise to the shoot.

(As provided in the textbook verbatim above)
The radicle and plumule represent the primary axis of the embryo, growing in opposite directions to form the two main systems of the plant. One goes down to find water and nutrients, while the other goes up to find light.
Teacher's Tip: Remember "R" for Radicle/Root and "P" for Plumule/Shoot (Plant).
Exam Tip: Present your differences in a clear table to make it easy for the examiner to award marks.

Question (b): Ilium and micropyle.
Answer:
IlIum : On one side of seed câat, there is scar called hi hum, which marks the place where the seed was attached to the fiiüt wall.
Micropyle : Above the hilum is a small pore called micrope. The micropyle absorbs as much water as is required for germination

(As provided in the textbook verbatim above)
Note: The textbook uses "Ilium" and "Hi hum," which are likely typos for "Hilum." The hilum is the attachment point, while the micropyle is the entry point for oxygen and water. These two features are crucial for the transition from a dormant seed to an active seedling.
Teacher's Tip: Think of the hilum as the "belly button" of the seed where it was attached to its mother plant.
Exam Tip: If you find a typo in a question, answer with the intended scientific term correctly spelled (like Hilum).

Question  (c): Testa and tegmen.
Answer:
Testa: The seed is protected by a thick outermost coat called the testa or seed coat.
Tegmen: Under the testa lies a very thin membrane called the tegmen.

(As provided in the textbook verbatim above)
These two layers together form the protective envelope of the seed. While the testa provides strength against physical damage, the tegmen offers an extra layer of delicate protection for the internal embryo.
Teacher's Tip: Testa is the "Tough" outer layer, and Tegmen is the "Thin" inner layer.
Exam Tip: Mention that these coats develop from the integuments of the ovule.

Question 4: Give two functions of a fruit.
Answer:
Functions of a fruit are:
1. Fruit is a protective case for the seeds.
2. Fruit is a temptation to animals and man to eat it and scatter the seeds

(As provided in the textbook verbatim above)
Fruits are specialized structures that protect developing seeds and aid in their dispersal far from the parent plant. By providing nourishment to animals, the plant ensures its offspring are carried to new locations through animal movement.
Teacher's Tip: Protection and Dispersal are the two "D's" of fruit function (Defense and Distribution).
Exam Tip: Use the term "dispersal" when talking about scattering seeds for a more scientific answer.

Question 5: Match the columns :
Column A - Column B
(a) Radicle - (iii) Root
(b) Plumule - (i) Shoot
(c) Cotyledon - (ii) Store food material
(d) Testa - (v) Protection of seed
(e) Micropyle - (iv) Absorb water needed for germination
Answer :
(a) Radicle - (iii) Root
(b) Plumule - (i) Shoot
(c) Cotyledon - (ii) Store food material
(d) Testa - (v) Protection of seed
(e) Micropyle - (iv) Absorb water needed for germination

Answer: (As matched above based on the textbook guidelines)
Matching parts of the seed to their eventual adult forms or functions helps consolidate your understanding of plant development. It shows how every tiny part of a seed has a specific purpose for the future plant.
Teacher's Tip: Draw arrows between the columns first, then write the final pairs clearly.
Exam Tip: Rewrite the matched pairs together (e.g., Radicle - Root) rather than just drawing lines to avoid confusion.

Question 6: Radicle emerges out of the seed earlier than plumule. What one advantage is served by this ?
Answer:
Radicle comes out of the seed earlier than the plumule has advantages as it gets water and minerals from the soil and gives it to the growing plumule.

(As provided in the textbook verbatim above)
By establishing the root system first, the plant ensures a steady supply of hydration before the delicate shoot starts to grow. This "roots-first" approach provides the structural and nutritional foundation needed for the rest of the seedling to thrive.
Teacher's Tip: Roots are the "anchor" and "straw"; you need them before you can build the "house" (shoot).
Exam Tip: Explain that water is necessary for cellular activities that allow the plumule to expand.

Question 7: State whether the following statements are True or False.
(a) Some seeds have no cotyledons. - False
(b) Warmth is necessary for the germination of seeds. - True
(c) All seeds have two cotyledons. - False
(d) Oxygen is necessary for the germination of seeds. - True

Answer: (As provided in the textbook verbatim above)
These statements highlight the basic requirements for germination and the universal structure of seeds. While all seeds must have at least one cotyledon, the number varies, but the need for air and warmth is constant for most life forms.
Teacher's Tip: Cotyledons are essential because they are the baby plant's first food source.
Exam Tip: For false statements, always provide the correct fact (e.g., "Seeds have one or two cotyledons").

Question 8: State one function of the following:
(a) radicle
(b) cotyledons
(c) endosperm
(d) micropyle
Answer:
1. Radicle - form the roots
2. Cotyledons - On removing th& testa and the tegmen from a soaked bean seed, you will find that the seed is made up of two fleshy seed leaves called the cotyledolm. They contain stored food material which is used by the seedlling for growth.
3. Endosperm - ovary forms the fruit.
4. Micropyle - Above the hilum is a small pore called micropyle (micro = small, pyle = passage). The micropyle absorbs and allows as much water as is required for germination.

(As provided in the textbook verbatim above)
Note: In point 3, the textbook mentions "ovary forms the fruit," but the specific function of the endosperm is to provide nutrients to the developing embryo. These parts are the building blocks that allow a seed to transform into a living organism.
Teacher's Tip: Endosperm and Cotyledons are both "nutrient warehouses."
Exam Tip: Use the term "nutritive tissue" when describing the function of the endosperm.

Question 9: The three conditions necessary for germination of seeds are (tick the correct answer):
(a) Oxygen, suitable temperature and water.
(b) Good soil, water and air
(c) Good soil, suitable temperature and light.
(d) Light, oxygen, and temperature.
(e) Oxygen, carbon dioxide, and light.

Answer: (a) Oxygen, suitable temperature and water.
Seeds need water to soften the coat and activate enzymes, oxygen for respiration to release energy, and warmth to speed up chemical reactions. Soil and light are often not required until after the plant has emerged and started making its own food.
Teacher's Tip: Remember the acronym W.O.W. - Water, Oxygen, and Warmth!
Exam Tip: If "soil" is in the option, it's usually wrong because seeds can germinate on wet cotton or paper.

Question 10: Name the part of the seeds from which the following are given out:
(a) Roots : .
(b) Leaves :
(a) Roots - Radicle give rise to roots.
(b) Leaves - Plumule gives rise to shoot bearing leaves.

Answer: (As provided in the textbook verbatim above)
These specific embryonic parts are genetically programmed to develop into complex organ systems. The radicle's transformation into roots and the plumule's into a leafy shoot are the first major milestones in a plant's life.
Teacher's Tip: Think of Radicle as the "Root-maker" and Plumule as the "Plant-maker."
Exam Tip: Use the term "shoot system" instead of just leaves for a more complete answer.

Question 11: In the spaces provided below, draw labelled diagrams to show the three stages in the germination of any seed you have observed.
(Diagrams showing: 1. Complete Seed with Testa/Seed Coat, 2. Radicle Emerged, 3. Plumule Emerged)

Answer: (As depicted in the textbook screenshots)
Drawing the stages of germination helps visualize the sequence of events that bring a seed to life. It clearly shows how the root system establishes itself before the green leaves appear above the soil.
Teacher's Tip: Always draw the radicle growing down and the plumule growing up.
Exam Tip: Make sure your diagram labels are connected to the correct part with a clear straight line.

Long Answer Questions
(Write the answers in your note-book)

Question 1: What is meant by pollination ? Name the two types of pollination.
The transfer of the pollen grains from the anthers to the stigma of a flower is called pollination.
The two types of pollination found in flowering plants are.
1. self-pollination - that occurs within the same plant.
2. cross-pollination - that occurs between two flowers of two different plants but of the same kind.

Answer: (As provided in the textbook verbatim above)
Pollination is the essential first step in sexual reproduction for plants, allowing male genetic material to reach the female organs. Without this process, fertilization cannot occur, and seeds would not be produced.
Teacher's Tip: Self-pollination is like "talking to yourself," and cross-pollination is like "talking to a neighbor."
Exam Tip: Mention agents of pollination like wind or bees to make your answer more detailed.

Question 2: Imagine that all the seeds produced by a plant happen to fall under the same plant and sprout into new plants. Mention any two problems that will be faced by the new plants.
If all the seeds produced by a plant happen to fall under the same plant and sprout into new plants then in this situation plants will face the following problems:
1. A large number of plants will grow in a small limited space. The water and the minerals available to them in the soil will be limited.
2. The air surrounding them will not be enough and less sunshine will be available to them. As a result, most of these sprouted plants will die.

Answer: (As provided in the textbook verbatim above)
This situation would lead to intense competition for survival among the young seedlings in a very small area. Overcrowding prevents the plants from getting enough sunlight and nutrients, which are essential for healthy growth.
Teacher's Tip: It's like having 100 people try to share one single sandwich in a tiny closet!
Exam Tip: Use the keyword "competition" to describe the struggle between the seedlings.

Question 3: What is a flower ? Draw a typical flower and label its different parts.
(Diagram of a typical flower with labels: Pollen grains, Stigma, Style, Ovary, Ovules, Anther, Filament, Petal, Sepal, Thalamus, Flower stalk/Pedicel)
Answer: A flower is a reproductive part of a plant. It helps in sexual reproduction as it has male parts and female parts.
A fully opened flower has the following parts:
Stalk - A flower is attached to the shoot by means of stalk or pedicel stalk. The tip of the stalk is swollen or flattened. This is called toms or thalamus or receptacle.
The different parts of a flower are inserted on the thalamus. There are usually four whorls as Calyx
1. Sepals (Calyx): These are the outermost part of the flower. These are leaf like and green in colour. This is the outer covering of the flower and form outer whorl in a flower. The Calyx (sepals) enclose the inner parts of the flower when it is a bud. It is protective in function.
2. Corolla (Petals): Petals form the second whorl inner to the sepals. These are usually coloured, gaudy, or white in colour and scented and give sweet smell. The value of a flower is due to the attractive colour of the petals. These attract the insects for pollination.
3. Stamens (Androecium): The third whorls inner to the petals are stamens. This third whorl is called Androecium. These are the male parts of the flower. Each stamen is formed of a long narrow, hair like structure called filament. On its tip it bears a rounded broad sac like structure called anther. Each anther has two anther lobes. Each anther lobe has two pollen sacs which have powdery mass called pollen grains.
4. Carpels (Gynoecium): Carpels are the inner most or fourth whorl in a flower. It is lodged on the thalamus and forms the female part of a flower. This whorl of carpels is called gynoecium. Each carpel or pistil has three parts,
1. The lower most, swollen part is ovary. It is attached to the thalamus
2. The middle part is style which is narrow, thread like
3. Stigma: The style ends in a knob like, rounded structure which is sticky in nature to receive the pollen grains.The ovaries contain ovules which later turn into seeds after fertilization and the ovary wall forms the fruit sometimes the thalamus also becomes a part of the fruit as in apple.

(As provided in the textbook verbatim above)
The flower is a highly complex structure where every whorl has a specific function, from protection to reproduction. Understanding these whorls helps us see how plants have adapted to attract pollinators and create seeds for the next generation.
Teacher's Tip: Memorize the order from outside to inside: S.P.S.C. (Sepals, Petals, Stamens, Carpels).
Exam Tip: When asked to "describe" a flower, always list all four whorls and their specific roles.

Question 4: With the help of a suitable labelled diagram, describe the structure of a dicot seed.
(Diagram of Structure of seed of Bean showing: Hilum, Micropyle, Position of Radicle, Testa, Tegmen, Plumule, Radicle, Cotyledon)
Answer: It is a dicotyledonous and non-endospermic seed. It is produced in a long cylindrical pod (fruit - phali) External characters. The seed is brown or whitish brown in colour. The seed is hard and smooth and kidney shaped i.e.. Convex on one side and concave on the other side. Concave side bears whitish scar called hilum. It is the place which is attached to the wall of the pod through a stalk called funicle. At one side of the hilum is a small pore called micropyle water enters through it.
Internal structure - The seed is covered by a hard, tough covering called testa. Inner to the tests is the embryo. Embryo consists of two cotyledons and embryo axis. Embryo axis has plumule and radicle. The plumule is present in between the two cotyledons and its top bears two folded tiny leaves. It forms future shoot and leaves of the growing seed. Radicle is rod shaped and is out of the two cotyledons. It forms the root of the growing seed. When the seed grows the two cotyledons come out of the soil and form cotyledonary leaves and turn green in colour. Cotyledons give food to the growing seedling as it has food. The germination in this seed is epigeal as cotyledons come outside the soil in the growing seed.

(As provided in the textbook verbatim above)
A dicot seed like a bean is essentially a tiny dormant plant wrapped in a protective shell with its own food supply. The two cotyledons serve as the primary source of energy until the plant can establish its own roots and start photosynthesis.
Teacher's Tip: The bean seed is "kidney-shaped," which is a great way to identify it.
Exam Tip: Clearly mention "non-endospermic" to show you know that the food is in the cotyledons, not a separate tissue.

Question 5: Define germination ? Name the two types of germination. Explain with examples.
Answer :
The growth and development of the embryo present in the seed into a seedling (or a young plant capable of independent existence) is called as seed germination.
The embryo in a seed remains inactive or dormant. When the seed is put into the soil and given water and under suitable temperature, the embryo becomes active on absorbing the water and the embryo turns into a seedling.
Types of germination - There are three types of germinations.
(i) Epigeal
(ii) Hypogeal
(iii) Viviparous
(i) Epigeal germination - Epi means above ; geo-ground (earth)
When the cotyledons in growing seed come out of the soil it is epigeal type of germination as in case of castor seed, cucumber, tamarind, bean seed the cotyledons come out of the soil and turn green. These are called cotyledonary leaves. These cany on photosynthesis till new leaves arise.
(ii) Hypogeal germination - Hypo-below, gea soil.
When in a growing seed the cotyledons remain under the ground as in case of gram, pea, groundnut and maize. The plumule firms the aerial shoot to which bears leaves and the radicle gives rise to roots. The growing seedling gets food from the cotyledons. As the seedling grows the cotyledons die in the soil.
(iii) Viviparous germination - This is special type of germination.
This occurs in plants growing along the sea coasts and in salt lakes. The seed start growing while it is still attached to the plant as in mangrove plants. The embryo comes out of the fruit with a long, dart like radicle. It falls directly into soft, slushy, wet mud. The radicle gives root and establishes as a seedling and the plumule give rise to shoot. This is in mangrove plants.

(As provided in the textbook verbatim above)
Germination represents the revival of life from a state of dormancy, triggered by environmental factors. Different plants have evolved different methods of germination, such as vivipary, to survive in challenging habitats like saltwater swamps.
Teacher's Tip: Remember: Epigeal = Above, Hypogeal = Below, Viviparous = Growing while attached.
Exam Tip: For each type of germination, always provide at least one clear example like "Mangroves" for Viviparous.

Question 6: What are the three conditions necessary for the germination of seeds. How would you demonstrate this?
Answer:
For successful germination of any viable seed, three external conditions are necessary as:
1. Water or moisture
2. Warmth or temperature
3. Air or oxygen.
We can demonstrate this with "Three seed experiment This is a simple experiment to demonstrate the necessity of these factors for proper germination.

(As provided in the textbook verbatim above)
These three factors are the universal keys that unlock the growth process within a seed. Depriving a seed of even one of these conditions will prevent the embryo from waking up and growing into a plant.
Teacher's Tip: Think of it as W.A.W. - Water, Air, and Warmth.
Exam Tip: Be prepared to describe the "Three seed experiment" in detail if asked for a demonstration.

Experiment:
Three seed experiment to demonstrate germination Three mature dried bean seeds are taken and tied on a wooden strip at three different positions (above the figure). This strip is placed in a beaker containing water in such a way that the lower seed is completely submerged in water, the middle seed is partially submerged inside the water and the top seed is kept above water. This set-up is left in a warm place for few days.
It is observed that the middle seed shows germination and gives out radicle and shoot leaves. The top seed shows no growth and the bottom one shows negligible growth.
The middle seed gets fully germinated due to the fact that this seed has all the favourable conditions required for germination i.e., air (oxygen), moisture and warmth (favourable temperature), which are necessary for germination.

(As provided in the textbook verbatim above)
This experiment effectively isolates the variables needed for life to begin. It proves that a balance of all three conditions is required, as the seeds that were either too dry or completely underwater failed to thrive.
Teacher's Tip: The middle seed is the "Goldilocks" seed - it has exactly what it needs.
Exam Tip: When describing experiments, clearly state the observations (what you saw) and the conclusion (what it proved).

Question 7: Give the main difference between hypogeal and epigeal and germination.
Answer:
Epigeal germination - Epi means above; geo-means ground (soil). When the cotyledons in a growing seed come out of the soil it is epigeal type of germination as in case of castor seed, bean seeds, pulses, tamarind cucumber.
The cotyledons come out of the soil and turn green these are cotyledonary leaves and carry on the function of photosynthesis till new leaves arise in the growing seedling.
Hypogeal germination - Hypo-below, geo-soil it is that type of germination in which in the growing seed the cotyledons remain under the soil as in case of pea, gram, ground nut, maize. The plumule forms the aerial shoot which later bears leaves and die radicle gives rise to root. The tiny seedling gets food from the cotyledons till it establishes itself in the soil by its roots and starts getting water and minerals and as well the new leaves arise on the ascending axis and they start making food by the process of food making.

(As provided in the textbook verbatim above)
The fundamental difference lies in whether the food storage leaves (cotyledons) emerge to help with photosynthesis or stay buried as a nutrient source. Epigeal plants get an early energy boost from the sun, while hypogeal plants rely on their underground stores longer.
Teacher's Tip: Epigeal = Exit the ground; Hypogeal = Hide in the ground.
Exam Tip: Mentioning that epigeal cotyledons turn green is an important detail for full marks.

Differences - Epigeal germination vs. Hypogeal germination:

Epigeal germination:
1. In this type of germination the cotyledons come out of the soil.
2. The cotyledons turn green as they come out of the soil and serve as cotyledonary cotyledons leaves and carry on photosynthesis to make food for the growing seedling.
3. The cotyledons become pale and fall off when the ascending axis bear leaves
Hypogeal germination:
1. In this type of germination the cotyledons remain under the soil.
2. The cotyledons remain under the ground and the seedling gets food from the till it establishes in the soil.
3. The cotyledons get rotten up in the soil when the seedling matures.

(As provided in the textbook verbatim above)
This comparison clarifies the different biological pathways seedlings take to reach maturity. While one uses its cotyledons for light capture, the other uses them purely as a subterranean pantry.
Teacher's Tip: In epigeal, the "cotyledon leaves" are temporary; they fall off once true leaves grow.
Exam Tip: Use a numbered list for differences to ensure your points are distinct and clear.

Question 8: State the location of the following in a flower:
Answer:
1. Sepals: These are the outermost part of the flower. These are leaf like and green in colour. This is the outer covering of the flower and form outer whorl in a flower. The Calyx (sepals) enclose the inner parts of the flower when it is a bud. It is protective in function.
2. Petals: Petals form the second whorl inner to the sepals. These are usually coloured, gaudy, or white in colour and scented and give sweet smell. The value of a flower is due to the attractive colour of the petals. These attract the insects for pollination.
3. Anther - It is present at the end of a stamen. Anther has poller sacs in which pollen grains are formed. Pollen grains contain the male gametes.
4. Stigma - It is the terminal knob-like part, it may be divided into two or more lobes and assume a feathery appearance. The stigma is covered with hair or with glandular papillae. It serves as the landing place grains for pollen during pollination.

(As provided in the textbook verbatim above)
Each part of the flower is strategically placed to optimize its specific role, such as protection at the base or attraction in the middle. The stigma is always at the top to ensure it is the first point of contact for passing pollen grains.
Teacher's Tip: The location "terminal knob-like part" means the stigma is the very tip of the female organ.
Exam Tip: Describe the appearance along with the location to make your answer more descriptive.

Question 9: Given below is the diagram of a typical flower. Label the parts marked by guidelines.
Answer:
(Diagram of a typical flower showing labels: Stigma, Style, Ovary, Ovules, Sepal, Thalamus, Petal, Filament, Anther)

(As depicted in the textbook screenshots)
Labeling a standard flower diagram is a fundamental skill for understanding how different parts interact during pollination and fertilization. It connects the physical structure of the flower to the biological functions you have learned.
Teacher's Tip: Practice drawing this "cross-section" view so you can see inside the ovary.
Exam Tip: Use straight lines for your labeling guidelines and ensure they touch the exact part being named.

Question 10: Give the difference in the function between the following parts:
(a) Ovary and ovule
(b) Petal and sepal
(c) Filament and style
(d) Pollen and ovule
Answer:
(a) Ovary and ovule -
1. Ovary is the female reproductive part of a flower and ovules are located inside the ovary.
2. Ovary after fertilization turns into a fruit whereas ovules turn into seeds of fruit.
(b) petal and sepal - Petals are colourful and attractive and helps to attract insects for pollination whereas the main function of sepals is to provide protection to the growing bud.
(c) filament and style - The filament is a stalk like structure that attaches and support the flower and support the anther which is the structure that produces pollens whereas the style transfers the male gametes of the pollen grains into the ovary.
(d) pollen and ovule - The function of pollen is to deliver male gametes (sperm) from stamen of a plant to an ovule whereas ovule, when fertilized, well developed into a seed. It is a female reproductive cell.

(As provided in the textbook verbatim above)
Distinguishing between these structures clarifies the relationship between male and female reproductive components in plants. Every part has a role, from the physical support of reproductive organs to the eventual creation of the fruit and seeds we see in nature.
Teacher's Tip: Ovary/Ovule is a "Container/Content" relationship.
Exam Tip: Focus on what each part "becomes" after fertilization for the best comparison.

ADDITIONAL QUESTIONS

I. Multiple choice questions. Tick (✓) the correct choice:

Question 1: A seed consists of
(a) embryo
(b) seed coat, embryo and cotyledons,
(c) embryo and seed coat
(d) seed coat and endosperm

Answer: (c) embryo and seed coat
At its simplest level, every mature seed must have these two fundamental components. The coat provides a barrier against the environment, while the embryo carries the genetic information for the next plant.
Teacher's Tip: The seed coat is the "armor" and the embryo is the "baby."
Exam Tip: Be careful with option (b) as cotyledons are actually a part of the embryo.

Question 2: An embryo of a seed consists of
(a) plumule
(b) radicle, plumule and cotyledons,
(c) plumule and radicle
(d) radicle and cotyledons

Answer: (b) radicle, plumule and cotyledons,
The embryo is the entire immature plant found within the seed, containing all the essential parts to begin life. The radicle and plumule form the main body axis, while the cotyledons provide the necessary energy for the first few days of growth.
Teacher's Tip: Think of the embryo as a complete "mini-kit" for building a plant.
Exam Tip: Always include cotyledons as part of the embryo in your definitions.

Question 3: Conditions necessary for seed germination are
(a) water, oxygen and suitable temperature
(b) water and oxygen
(c) water and suitable temperature
(d) water, oxygen and enzymes

Answer: (a) water, oxygen and suitable temperature
These three environmental factors work in harmony to trigger the biological processes required for growth. Moisture softens the seed, oxygen allows the embryo to breathe, and warmth provides the energy for chemical reactions.
Teacher's Tip: Remember W.O.W. - Water, Oxygen, and Warmth.
Exam Tip: If "enzymes" are mentioned, remember they are internal to the seed, while the question asks for external "conditions."

II. Fill in the blanks:

Question 1: In bean seed, germination is epigeal.
Question 2: Three conditions necessary for seed germination are water, oxygen and favourable temperature.
Question 3: A mature seed consists of embryo and seed coat.

Answer: (As provided in bold above)
These fundamental facts about seeds and growth are the building blocks of botany. Mastering these terms will help you understand more complex plant biology topics later on.
Teacher's Tip: In beans, the cotyledons pop up like little green leaves; that's epigeal!
Exam Tip: Always state "favourable" temperature, as extreme heat can kill the seed.

III. Differentiate between the following:

Question 1: Epigeal germination and Hypogeal germination
Answer:
Epigeal germination
1. It is a type of germination where cotyledons are pushed above the soil.
2. It is shown by dicot
Hypogeal germination
1. It is a type of germination where cotyledons remain in the seed below the soil.
2. It is shown by monocot

(As provided in the textbook verbatim above)
Note: While many monocots show hypogeal germination, some dicots (like pea) do too. The primary distinction is the final location of the cotyledons during the early seedling stage.
Teacher's Tip: "E" for Epigeal and "E" for Emerge (above ground).
Exam Tip: Provide examples like bean (epigeal) and maize (hypogeal) to support your answer.

Question 2: Dicot seed and Monocot seed
Answer:
Dicot seed
1. The dicot seed has two cotyledons.
2. Endosperm is absent.
3. Seed coat is not fused with fruit wall.
4. Examples : bean, pea, gram.
Monocot seed
1. Monocot seed has one cotyledon.
2. Endosperm is present.
3. Seed coat is fused with fruit wall.
4. Examples: rice, maize.

(As provided in the textbook verbatim above)
Dicot and monocot seeds have distinct structural differences that determine how they store and use nutrients. These differences are so fundamental that they are used to classify all flowering plants into two major groups.
Teacher's Tip: "Di" means two (two cotyledons) and "Mono" means one (one cotyledon).
Exam Tip: Mention the "fusion of seed coat and fruit wall" as a key distinguishing feature for monocots like corn.

Question 3: Seed coat and Embryo
Answer:
Seed coat
1. It is the protective covering of the seed.
2. It develops from the protective layer around the ovules.
3. The seed coat determines the shape of the seed.
4. Water diffuses through the seed coat into the embryo causing swelling of seed and rupturing of seed coat during germination
Embryo
1. It is the young plant enclosed within the seed coat which germinates to form a new plant.
2. It is a product of fertilisation inside the ovary.
3. Embryo just fills in the shape determined by seed coat.
4. It consists of radicle, plumule and cotyledons which give rise to root and shoot system of the plant.

(As provided in the textbook verbatim above)
The relationship between the seed coat and the embryo is one of protection and potential. While the coat shields the life within from damage, the embryo holds all the genetic instructions needed to build a complete new organism.
Teacher's Tip: One is the "box" (coat) and the other is the "toy" inside (embryo).
Exam Tip: Explain that the embryo is the "living" part that actually grows during germination.

IV. Define the following:

Question 1: Embryo: In plants, embryo is the baby plant present inside a seed which consists of radicle, plumule and cotyledons. It develops into a plant. In animals, embryo is the early stage in the development of an organism. A fertilized egg develops into an embryo which grows into an adult plant or animal.

Answer: (As provided in the textbook verbatim above)
The embryo is the foundational stage of life for both plants and animals, representing the earliest form of a multicellular organism. It contains all the necessary parts that will eventually differentiate into complex organs and tissues.
Teacher's Tip: Think of the embryo as the "biological draft" of a complete living being.
Exam Tip: Be sure to mention the three specific parts of a plant embryo: radicle, plumule, and cotyledon.

Question 2: Seed germination: Seed germination is the process by which the embryo within the seed becomes active and grows into a new plant under favourable conditions.

Answer: (As provided in the textbook verbatim above)
Germination is the chemical and physical activation of a dormant life form once it senses the right environmental signals. This process transitions the plant from a protected, stationary seed to an active, growing seedling.
Teacher's Tip: Germination is the seed's "wake-up call."
Exam Tip: Mention that "favourable conditions" (water, oxygen, temperature) are required for this definition to be complete.

V. Mention the functions of the following:

Question 1: Radicle: The radicle is the part of embryo inside the seed which first comes out of the seed coat during germination and forms the root system of the plant.

Answer: (As provided in the textbook verbatim above)
The radicle's primary job is to establish a connection with the soil to secure water and stability. Its early emergence is a critical survival strategy to hydrate the rest of the embryo.
Teacher's Tip: Radicle = Root system foundation.
Exam Tip: Use the word "emerges" to describe how the radicle leaves the seed coat.

Question 2: Plumule: The plumule is the portion of the plant embryo which gives rise to first leaves and forms the shoot system of the plant during germination.

Answer: (As provided in the textbook verbatim above)
The plumule is the architect of the plant's above-ground structure, developing into the stem and foliage. It is designed to push through the soil and find sunlight for photosynthesis.
Teacher's Tip: Plumule = Plant shoot developer.
Exam Tip: Specify that it forms the "first leaves" as these are often different from later adult leaves.

Question 3: Cotyledons: The cotyledons provide food for the embryo during the first stages of germination in dicot plants. They act as leaves and perform photosynthesis in a seedling. In monocots, it absorbs the food from the endosperm and transport it to the embryo.

Answer: (As provided in the textbook verbatim above)
Cotyledons are multi-purpose organs that can either store food or manufacture it depending on the species and stage of growth. They provide the initial burst of energy needed before the plant's true leaves are large enough to take over.
Teacher's Tip: Cotyledons are the "starter batteries" for the seedling.
Exam Tip: Distinguish between their role in dicots (storage/photosynthesis) and monocots (absorption).

Question 4: Endosperm: The endosperm is the nutritive tissue surrounding the embryo in a seed which provides nourishment to the developing embryo in a seed during germination.

Answer: (As provided in the textbook verbatim above)
In many seeds, especially grains, the endosperm is the main fuel tank containing concentrated starch and proteins. It is the tissue that humans often harvest for food, such as in rice, wheat, and corn.
Teacher's Tip: When you eat rice, you are mostly eating the plant's endosperm!
Exam Tip: Use the term "nutritive tissue" to clearly describe the endosperm's function.

Question 5: Seed coat: Seed coat is the outer covering of the seed which protects the seed (embryo and endosperm) from injury and attack of bacteria, fungi and insects.

Answer: (As provided in the textbook verbatim above)
The seed coat is a vital barrier that allows a seed to survive in the soil for months or even years without rotting. It is tough enough to withstand physical pressure while remaining permeable to water when the time is right to grow.
Teacher's Tip: The seed coat is the seed's "suit of armor."
Exam Tip: Mention "protection from bacteria and fungi" as a key biological function.

VI. Answer the following questions :

Question 1: Mention the conditions necessary for seed germination.
Answer:
The conditions necessary for seed germination are:
1. Water: It is needed for seed to swell up and burst open. It is also needed to make the stored food soluble to feed the embryo inside a seed.
2. Oxygen: Oxygen is required for respiration.
3. Favourable temperature: Temperature ranging from $25^{\circ}C$ to $35^{\circ}C$ is suitable for germination.

(As provided in the textbook verbatim above)
These three factors are essential for switching on the metabolic machinery of the seed. Without them, the dormant embryo will not be able to process its food stores or build new tissues.
Teacher's Tip: Seeds are like "sleeping beauties" that need water, air, and warmth to wake up.
Exam Tip: Provide the specific temperature range ($25^{\circ}C$ to $35^{\circ}C$) to show precision in your knowledge.

Question 2: Describe the process of germination in bean and maize seeds.
Answer:
Germination in bean seed is called epigeal germination. It occurs as follows:
1. Germination starts with the uptake of water which bursts the seed coat and radicle comes out and grows downwards.
2. Region of plumules elongates and seed comes out of the soil. The plumule emerges between the two cotyledons.
3. The plumule forms two green leaves.
4. The food stored in the cotyledons is used for growth and cotyledons shrivel and fall off.
5. The radicle gives rise to the root system while the plumule forms the shoot.
Germination in maize seed is called hypogeal germination. It occurs as follows:
1. The seeds absorb water and swells.
2. Radicle comes out of the seed and forms the primary root.
3. The plumule comes out forming the leaves.
4. The food stored in the endosperm is used for growth
5. The cotyledons remain below the ground.

(As provided in the textbook verbatim above)
Bean and maize demonstrate the two main ways that seeds start their journey, either by bringing their food source above ground or keeping it protected below. Each method has its own sequence of tissue development suited to the plant's monocot or dicot structure.
Teacher's Tip: In beans, the whole seed pops up; in corn, only the green shoot pops up.
Exam Tip: Draw the different stages for both (using the textbook diagrams as a guide) to clearly show the height of the cotyledons.

Question 3: Name the two types of seed germination.
Answer:
The two types of seed germination are:
1. Epigeal germination.
2. Hypogeal germination

(As provided in the textbook verbatim above)
These categories are based on the movement of the cotyledons during the growth process. While epigeal is characterized by the cotyledons rising above ground, hypogeal means they stay subterranean.
Teacher's Tip: Epigeal = Exit ground; Hypogeal = Hide in ground.
Exam Tip: Briefly define each term if this is part of a short answer question to show extra understanding.