Question

Pollen grains are produced in?

a) Anther

b) Pollen sac

c) Filament

d) Stigma

Answer 1

The process of formation of pollen grains is meiosis of the microspore of the mother cell. These cells are located along the inner edge of anther sacs which are also called microsporangia.

Complete answer:

Flowers are considered the sexual part of the plant, as they help in the sexual reproduction. A flower can be bisexual or unisexual. That means it can contain both male and female reproductive organs or either male or female reproductive organs. The fertilization is the process by which male gamete is fused with female and zygote is formed. In plants the male gamete or male sex cell is the pollen grain which lands on stigma after pollination, forms a pollen tube and fuses with the egg. The question is asking about where these pollen grains are produced. Actually, the male reproductive organ is formed of anther and filaments together they are known as Stamen. Anther, contains pollen grains but pollen grains are produced in pollen sac. Pollen sac is the structure in seed plants in which pollen is produced. In angiosperms there are usually four pollen sacs in each anther; they contain the microspore mother cells. Therefore, it is the correct answer.

Filament is the part of stamen which connects anther with flower but plays no role in production of pollen grains. Stigma on the other hand is the part of the female reproductive organ on which the pollen grains land. Therefore, a d and c are wrong options.

Hence, the correct answer is option ‘b’.

Note: The pollen grains are termed microgametophytes, and consist of a sporopollenin coating which serves to protect the gametophytes as they are transported from the stamens (male) or male cone to the pistil (female) or female cone in flowering and coniferous plants, respectively.