Question

Male gametophyte in angiosperms produce:
A.Three sperms
B.Two sperms and a vegetative cell
C.Single sperm and vegetative cell
D.Single sperm and two vegetative cells

Answer 1

Hint:Angiosperms are flowering plants where the seeds are found inside the flower. The seeds develop from the ovum in the ovary and then form the fruit. Pollen grain is the male gametophyte in the angiosperms.

Complete step by step answer:
In angiosperms, the female reproductive organ is called pistil or also known as carpel and the male reproductive organ is called stamen. The pollen grain develops on the anther present on the stamen. The pollination (transfer of pollen grains from anther to the stigma) of the pollens is necessary for the reproduction to happen. The pollen is then taken to the stigma of the pistil, that is the female part of the flower. Style allows the migration of pollen to the ovary by stigma.
The exine of the pollen grain, also called the microspore has two haploid nuclei of which one is germ nucleus and the other is the tube nucleus. The germ nucleus develops into two sperms or two non-motile male gametophytes by mitosis. The tube nucleus forms the vegetative cell, which forms the pollen tube. So, the male gametophyte in angiosperms produces two sperms and a vegetative cell.

Hence, the correct answer is an option (B).

Additional Information:
One of the sperms fertilize the ova in the ovary and form zygote and the other sperm fuses with the two polar bodies and form endosperm, which provides nutrition to the embryo. Embryo is the young developing plant inside the seed which develops as a result of several egg cell divisions. Embryo sac is formed when the haploid megaspore also called megagametophyte nucleus divides. It consists of two haploid nuclei and six haploid cells. It is equivalent to the female gametophyte of lower plants.

Note:
Pollination occurs via wind, air, water, or many other ways. The pollen grains are present on the inner sacs of anther that are produced by meiosis of microspore.