Question

Double fertilisation involves fertilisation of ______.

Options

• an egg by two male gametes

• two eggs in the same embryo sac by two male gametes from one pollen tube

• egg cell and central cell by male gametes from two different pollen tubes

• egg cell and central cell by male gametes from same pollen tube

Answer 1

Double fertilisation involves fertilisation of egg cell and central cell by male gametes from same pollen tube.

Explanation:

One male gamete fuses with the egg, and the other fuses with the central cell. Both gametes are delivered by the same pollen tube; the other options misstate the cells or pollen-tube source involved.