In the figure given below label the following parts: male gametes, egg cell, polar nuclei, synergid and pollen tube

Why does the zygote begin to divide only after the division of Primary endosperm cell (PEC)?

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

Starting with the zygote, draw the diagrams of the different stages of embryo development in a dicot.

What are the possible types of pollinations in chasmogamous flowers? Give reasons.