Question

Microspore mother cell forms
a) Microsporangium
b) Pollen sac
c) Female Gametophyte
d) Pollen grains

Answer 1

Hint: Microspore is a reproductive cell. The microspore has the ability to develop new individuals without any fusion with other reproductive cells. These are the spores which are produced by the sporophytes.

Complete answer:
Microspores are the spores produced by sporophytes. These spores are haploid and give rise to male gametes. In flowering plants the microspores are formed within the pollen sacs of the anther.
A) MICROSPORANGIUM: Male reproductive organs are referred to as Microsporangium. The development of pollen takes in the structure called microsporangium. The microsporangia are made up of bi-lobed pollen sacs . These microspores develop into pollen grains.
B) POLLEN SAC : It is the structure in a seed plant , where pollen is present . Angiosperms contain four pollen sacs in each anther and they contain the microspore mother cells. In gymnosperms numerous pollen sacs are present on the microsporophyll and that is responsible for producing the male cone.
C) FEMALE GAMETOPHYTE: The female gametophyte is generally referred to as embryo sac or mega gametophyte. The female gametophyte develops within the ovule and consists of three antipodal cells, one central cell, two synergid cells, and one egg cell.
D) POLLEN GRAINS: Pollen grains are microscopic structures, containing an androecium – a male reproductive organ of a flower. The interior section of pollen grain contains cytoplasm and the tube cell. The tube cell converts into a pollen tube and the generative cell releases the sperm nuclei.

Thus the correct answer is , (D) POLLEN GRAIN.

Note: Microspore mother cell is formed as a result of mitosis. A Microspore mother cell produces 4 pollen grains and these pollen grains are responsible for producing the male gametes. The microspores are haploid in nature.