Question

30. Carefully observe the given diagram and answer the questions related with it :
Questions: (1) Identify 'a' and state what it carries.
(2) Identify 'b' and state the changes in its structure after fertilisation.

Answer 1

Answer:

a Carris pollen grains from stigma to ovary ,it is a simple tube b is ovary and it's function is to collect pollen grain and triple fertilisation is done inside the ovule of that flower

Answer 2

Answers for the above questions are as follows:

1) a is identified as a Pollen tube.

• Pollen tube carries pollen grains from the stigma to the ovules at the base of the pistil.

• Pollen grains are reaches to the ovules or egg cells and fertilizer the plant to produce seeds.

2) b is identified as Ovary.

• After fertilization, the sperm cells are fises with the embryo cells inside the ovule.

• Each ovule develops into seeds. Each seed matures itself as a fruit.