Question

(a) Identify A, B, C and D in the given diagram and write their names.
(b) What is pollination ? Explain its significance.
(c) Explain the process of fertilisation in flowers. Name the parts of the flower that develop after fertilisation into
(i) seed,
(ii) fruit.

Answer 1

pollination is a transfer of pollen statement to carpel in flower

Answer 2

(A) Name the parts:

The image in the question is attached below.

A = Pollen grain

B = Pollen tube

C = Ovary

D = Female germ cell

(B) Pollination:

It is a process of transfer of pollen grains from to stigma of a carpel from anther of a stamen. There are two types of pollination:

1. Self pollination (Pollination takes place in same plant)
2. Cross pollination (Pollination takes place in different plant)

Significance:

• It is widely helpful in reproduction of plants.
• It cause variation in the plant species as pollen grains of some plants may fertilise with other plants.

(c) Fertilisation process:

When the pollen grains are dropped into the stigma. The pollen grain (male gamete) travels towards female gamete through pollen tube. The male and female fertilise to form zygote. It is developed into new plant. This process is called fertilisation.

(i) Seed: It is developed from ovary.

(ii) Fruit: It is developed from eggs of the ovule.