Name the parts labelled as A, B, C and D in the diagram given below:

Question

(a) Name the parts labelled as A, B, C and D in the diagram given below:

(b) What is pollination? State its significance.

(c) How does fertilization occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilization.

Answer 1

(a) Four labelling A - Pollen grain
B - Pollen tube C - Ovary
D - Female germ cell

(b) Definition : Transfer of pollen grains from anther to stigma.
Significance: To bring about fertilization.

(c) As the pollen lands on the suitable stigma a pollen tube grows through the style carrying the male germ cell. It reaches the ovary and the male germ cell fuses with the female germ cell and thus fertilization takes place.

(i) Seed → Ovule
(ii) Fruit → Ovary