CBSE Class 6 Science Advanced Biology Getting to Know Plants Very Short Answer Questions Set 01

Fill in the Blanks

Question 1. ___________ is the male reproductive part of the flower.
Answer:
Androecium (the stamens together).
In simple words: The stamens make up the male part of a flower.

Teacher's Note:
1. Androecium is the third whorl of a flower.
2. Each stamen has a filament and an anther.

Question 2. Zimikand is a type of _______.
Answer:
Corm. It is a rounded underground stem covered with scaly leaves.
In simple words: Zimikand is an underground stem called a corm.

Teacher's Note:
1. Gladiolus is another corm.
2. Corms are stems, not roots.

Question 3. Leaves are green as they contain ____ pigment.
Answer:
Chlorophyll.
In simple words: The green colour of leaves comes from chlorophyll.

Teacher's Note:
1. Chlorophyll traps sunlight for photosynthesis.
2. Write the word 'pigment' in the definition.

Question 4. Plants with fibrous roots have ______venation.
Answer:
Parallel. Monocots have fibrous roots and parallel-veined leaves.
In simple words: Fibrous roots go with parallel veins in leaves.

Teacher's Note:
1. Tap root goes with reticulate venation.
2. Wheat, rice and maize are examples.

Question 5. Ovule grows in the ______________.
Answer:
Ovary. The ovules are attached to the placenta inside the ovary.
In simple words: Ovules develop inside the ovary.

Teacher's Note:
1. After fertilization the ovule becomes a seed.
2. The ovary becomes the fruit.

True or False

Question 6. Root cap is present on tip of each branch of root. (True / False)
Answer:
True. Every root branch has a cap at its tip that protects the soft growing part as it pushes through soil.
In simple words: Each root tip wears a protective cap.

Teacher's Note:
1. The root cap works like a helmet.
2. It is found at the tip, not at the base.

Question 7. Fibrous roots are found in most of the Dicot. (True / False)
Answer:
False. Fibrous roots are found in monocots such as wheat and rice. Dicots have tap roots.
In simple words: Dicots have tap roots, not fibrous roots.

Teacher's Note:
1. Monocot = fibrous; dicot = tap.
2. Change one word to make the statement true.

Question 8. Rice plant has fibrous root system. (True / False)
Answer:
True. Rice is a monocot and has a cluster of fibre-like roots.
In simple words: Rice has fibrous roots.

Teacher's Note:
1. Grasses, wheat and maize are the same.
2. Rice leaves have parallel veins.

Question 9. Bamboo has prop roots. (True / False)
Answer:
False. Bamboo has stilt roots that arise from the lower nodes. Prop roots grow from branches, as in banyan.
In simple words: Bamboo has stilt roots, not prop roots.

Teacher's Note:
1. Stilt roots come from stem nodes.
2. Banyan has prop roots.

Question 10. Stem grows from the plumule of the embryo of a seed. (True / False)
Answer:
True. The plumule is the future shoot and the radicle is the future root.
In simple words: The plumule grows into the shoot (stem).

Teacher's Note:
1. Plumule = shoot; radicle = root.
2. Both are parts of the embryo.

Question 11. The broad green part of the leaf is called lamina. (True / False)
Answer:
True. The lamina (leaf blade) is the broad, flat, green part.
In simple words: The lamina is the flat green blade of the leaf.

Teacher's Note:
1. Petiole is the stalk.
2. Midrib is the central thick vein.

Question 12. The leaf is called 'the food factory' of a plant. (True / False)
Answer:
True. Leaves make food by photosynthesis.
In simple words: Leaves make the food for the plant.

Teacher's Note:
1. Photosynthesis takes place in leaves.
2. Use the word 'photosynthesis' in the answer.

Match the Column

Teacher's Note:
1. Match the sure pairs first.
2. Fibrous goes with monocot and tap with dicot.

Very Short Answer Type

Question 14. Name the two main organ systems in plants.
Answer:
The root system and the shoot system.
In simple words: A plant has a root system below the ground and a shoot system above it.

Teacher's Note:
1. Shoot system = stem, branches, leaves, flowers, fruits.
2. Root system = main root and its branches.

Question 15. Name any two functions of roots.
Answer:
1. Roots fix the plant firmly in the soil (anchorage).
2. Roots absorb water and minerals from the soil through root hairs.
In simple words: Roots hold the plant and take in water and minerals.

Teacher's Note:
1. Mention root hairs for absorption.
2. Storage and support are extra functions.

Question 16. Name any two modifications of roots along with their functions and examples.
Answer:
1. Storage of food: swollen taproots of carrot, radish, turnip and beetroot.
2. Support: prop roots of banyan hold up heavy branches (stilt roots of maize and sugarcane also support the plant).
In simple words: Some roots store food and some give extra support.

Teacher's Note:
1. Other modifications: climbing, parasitic and breathing roots.
2. Always give the example with the function.

Ask Yourself

Question 17. Which green has highest level of worldwide production (Hint: Rice is second)
Answer:
The question is worded unclearly; it most likely means the cereal grain. Maize (corn) is the grain produced in the largest quantity in the world.
In simple words: Maize is the world's top grain crop by quantity.

Teacher's Note:
1. Rice and wheat come next.
2. Among all crops by weight, sugarcane is the highest.

Question 18. Do all trees produce flowers ?
Answer:
No. Most trees, such as mango and neem, bear flowers, but conifers like pine and deodar are trees that make cones, not flowers.
In simple words: Not every tree has flowers.

Teacher's Note:
1. Cone-bearing trees are called conifers.
2. Mention one example of each.

Question 19. Is Pea a creeper or climber ?
Answer:
Pea is a climber. Its weak stem climbs by using leaf tendrils to catch a support.
In simple words: Pea climbs on supports with tendrils.

Teacher's Note:
1. Creepers spread on the ground; climbers go up.
2. Sweet pea also has leaf tendrils.

Question 20. What are deciduous trees.
Answer:
Deciduous trees shed all their leaves during a particular season (autumn or the dry season) and grow new ones later. Examples: teak, shisham, maple.
In simple words: They drop all their leaves once a year.

Teacher's Note:
1. Evergreen trees keep leaves all year.
2. Shedding saves water in dry weather.

Question 21. Can bamboo grow over 60 cm. in just one day.
Answer:
Yes. Bamboo is one of the fastest-growing plants; some species grow 60 cm or even more in a single day.
In simple words: Bamboo can grow more than 60 cm in a day.

Teacher's Note:
1. Bamboo is actually a giant grass.
2. It has stilt roots and a jointed stem.

Question 22. What are Halophytes ?
Answer:
Halophytes are plants that grow in salty soil or salty water, such as mangroves.
In simple words: Halophytes live in salty places.

Teacher's Note:
1. Mangroves also have breathing roots.
2. Halo means salt.

Question 23. Do you know what are adventitious roots ?
Answer:
Adventitious roots are roots that do not grow from the radicle but arise from other parts of the plant, such as stem nodes or leaves. Examples: stilt roots of maize, prop roots of banyan, roots of grass.
In simple words: They are roots that come from parts other than the radicle.

Teacher's Note:
1. Fibrous roots of monocots are also adventitious.
2. Money plant roots from nodes are another example.

Question 24. What is the white part seen coming out of sprouts.
Answer:
It is the young root (radicle) of the germinating seed, which comes out first and grows into the root system.
In simple words: The white tail is the baby root of the sprout.

Teacher's Note:
1. The radicle grows downwards.
2. Tiny root hairs may be seen on it.

Question 25. Do stems have pore ?
Answer:
Yes. Young green stems have stomata, and older woody stems have small pores called lenticels that allow gas exchange.
In simple words: Stems have tiny pores for gas exchange.

Teacher's Note:
1. Leaves have stomata.
2. Lenticels appear as small raised dots on bark.