CBSE Class 10 Science 2020 · Paper 31/4/1 · Question 28(a)

Diagram: the pistil in section, with a pollen grain on the stigma whose pollen tube (a) grows down the style into the ovule in the ovary, carrying the male germ cell (b) to the female germ cell (c) inside the ovule, as in the labelled figure. Process of fertilisation: the pollen grain that lands on the stigma forms a pollen tube, which grows through the style and reaches the ovule; the male germ cell released from it fuses with the female germ cell to form a zygote, which divides to form the embryo. (i) The ovary grows and ripens into the fruit. (ii) The ovule develops a tough coat and becomes the seed.