Page 108 - Ripples SCIENCE 7 - TEJPUR Edition 2024 Answer Key

E. Very short-answer questions

1. Name the different modes of asexual reproduction.

Ans. The different modes of asexual reproduction are:
(a) Budding (b) Fragmentation,

(c) Spore Formation (d) Vegetative propagation.

2. What is the other name for growing new plants through tissue culture?
Ans. Micropropagation

3. What do we call a fertilised egg?

Ans. Zygote
4. Give an example of a fruit whose seeds get dispersed by bursting.

Ans. Balsam

5. Give example of some seeds that are dispersed by animals.
Ans. Xanthium, Urena, etc.

6. Name the largest flower.

Ans. Rafflesia arnoldii.

7. Name the organism that reproduces by budding.
Ans. Yeast

8. Name the following:

(a) Bright, leaf-like part of a flower.
Ans. Petals

(b) Green leaf-like structure that protects the parts of the flower.

Ans. Sepals
F. Short-answer questions

1. How are pollen grains transferred from one flower to another?

Ans. Pollen grains are transferred from one flower to another through:

(a) Wind : The seeds which are very light & have wings are easily carried away by
wind or air. For example, seeds of drumstick, maple, etc.

(b) Water : Seeds having an outer fibrous or spongy covering are dispersed through

water. For example, coconut, lotus, etc.
(c) Birds : Seeds are dispersed to other places through the faecal matter of birds.

For example, neem, guava, etc.

(d) Animals : Seeds having spines attach to the fur of animals & get dispersed. For
example, Xanthium, Urena, etc.

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