Q16 of 21 Page 64

Coconut is a large and heavy fruit. How is it adapted for dispersal by water?

Even though coconut is large and heavy, it contains an outer fibrous coat which has the ability to float on water. It can drift in water bodies to different locations for a long period of time.


Coconut dispersed by water


The thick external husk protects the seed from animals, and unfavourable environmental conditions.


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14

When you keep food items like bread and fruits outside for a long time especially during the rainy season, you will observe a cottony growth on them.

(a) What is this growth called?


(b) How does the growth take place?

 15

Group the seeds given in Figure12.3 (i) to (iii) according to their means of dispersion.

(a) Seed dispersed by wind


(b) Seed dispersed by water


(c) Seed dispersed by animal


 17

In the figure of a flower given in Figure 12.4, label the parts whose functions are given below and give their names.

(a) The part which contains pollen grains.


(b) The part where the female gamete is formed.


(c) The female reproductive part where pollen grains germinate.


(d) The colorful part of flower which attracts insects.


 18

Fill in the blanks with correct terms.

The male and female gametes fuse to form a _____(a)______ during the process of _____(b)______. This grows into an _____(c)______ which is enclosed within a seed. After fertilisation the ovules develop into _____(d)______ and the ovary develops into a _____(e)______ .