CBSE Class 10 Science 2022 · Paper 31(B)/5 · Question 3(b)

The stamen is the male reproductive part of a flower. It consists of an anther, which produces the pollen grains, borne on a stalk called the filament. When a pollen grain lands on a suitable stigma: 1. It germinates: a pollen tube grows out of the pollen grain. 2. The pollen tube grows down through the style and reaches the ovary, where it enters an ovule, carrying the male germ-cell. 3. The male germ-cell fuses with the female germ-cell (egg) in the ovule. This fusion is fertilisation, and it gives a zygote, which is capable of growing into a new plant. After fertilisation the zygote develops into an embryo, the ovule becomes a seed and the ovary ripens into a fruit.