Question

The male gamete in plants is called
a. Penis
b. Testis
c. Semen
d. Pollen grain

Answer 1

Hint: In flowering plants, male gametes are transferred to the stigma of another flower through pollination. The male gamete in plants is produced by microspore mother cells that are present along the inner edge of the anther sacs.

Complete answer:
> Option (A) is incorrect. The penis is the male sex organ in humans. It is an organ that provides means for urination and sexual function in the case of man.

> Option (B) is incorrect. The testis is the male reproductive gland in all animals, including humans. Its main function is to produce sperms and testosterone.

> Option (C) is incorrect. Semen is a greyish-white fluid that is secreted by the testis of male animals, including humans. It is known to carry the sperms and fructose and other enzymes that are required for the survival of sperms that will further facilitate successful fertilization,

> Option (D) is correct. Pollen grains are microscopic structures that represent the male gamete of the plants. These are produced inside the anthers by the meiosis of microspore mother cells.

Hence, the correct answer is option (D).

Additional information:
A mature pollen grain consists of a double-layered wall i.e., exine (outer wall) and intine (inner wall). The vegetative and the generative cells are covered by a thin delicate wall called the intine which is further covered by a tough resistant cuticularized wall completely largely of sporopollenin called the exine. The pollen wall protects the male gametes while the pollen is moving from the anther to the stigma of the flower through pollination.

Note: In the flowering plant, the male gametophyte is the pollen grain while the female gametophyte is the embryo sac. These pollen grains can be transferred to the stigma of the flower either by wind or by insects and thus the plant is referred to as anemophilous and entomophilous, respectively.