Question

Pollen grain of an angiosperm represents

• A. Microsporophyll
• B. Megasporophyll
• C. Female gametophyte
• D. Male gametophyte

Answer 1

The correct option is D Male gametophyte

• Stamen is the male reproductive organ that consists of a long slender filament and broad knob like anther; each anther lobes of anther contains two long and cylindrical microsporangia. Since stamen bear microsporangia in anther lobes, they are also called microsporophylls. Option A is incorrect.
• Gynoecium represents the megasporophyll as it carries megasporangia, i.e., the ovule, at the basal part of the pistil. Option B is incorrect.
• Megaspore represents the first cell of the embryo sac/female gametophyte. Option C is incorrect.
• The pollen grain is the first cell of the male gametophyte that divides mitotically to form a small generative cell and a large tube/vegetative cells. Pollen with small generative and large vegetative or with one vegetative cell and two male gametes is known as a mature male gametophyte.

Thus, the correct answer is option D.