Question

Male gametes in angiosperms are formed by the division of
A) Microspore
B) Generative cell
C) Vegetative cell
D) Microspore mother cell

Answer 1

Hint:The androecium of the plant consists of the stamen, filament, and anthers. The pollen grains that carry the male gametes are contained within the anthers. The anther is anatomically divided into lobes and then the lobes are further divided into chambers called microsporangia.

Complete answer:Each pollen grain contains vegetative or non-reproductive cells and a generative cell or reproductive cell. In flowering plants, the vegetative tube cell produces the pollen tube, and then the generative cell divides to produce two sperm cells or male gametes.
Pollens present in these microsporangia. The microsporangia are also called pollen sac. It is also said that the pollen sac develops from a parent cell called the archesporial cell. The archesporial cell is divided into the outer and inner layers. The inner layer produces the sporogenous tissue which eventually forms the pollen mother cell.
This sporogenous tissue is surrounded by the tapetum layer which provides nourishment to the pollen or microspore mother cell present within the sporogenous tissue. The microspore mother cell is diploid and divides meiotically to make haploid microspores of pollen. This describes the method of microsporogenesis.
So, the right answer is option B that is Generative cell.

Additional Information:
Gametogenesis in angiosperms to make the female gametes, just like the male gametes, occurs in two stages:
• Megasporogenesis
• Megagametogenesis

Note:The pollen grain is the haploid cell which is made of two layers: the outer exine layer which comes from the tapetum and the other inner layer called intine. The exine is present over the pollen grain except in one small part from where the pollen tube emerges post pollination. This small part is called the germ pore.