Question

The generative cell of a two-celled pollen divides in the pollen tube but not in a three-celled pollen. Give reasons.

Answer 1

In a 3-celled pollen, the generative cell has already divided and formed 2 male gametes. Hence, it will not divide again in the pollen tube. Since in a 2-celled pollen, the generative cell has not divided, it divides in the pollen tube.