Question

Pollen sacs are present in
A.Anther
B.Pollen tube
C.Ovule
D.None of these

Answer 1

Hint: Pollen sacs are the structure that is present in the male part of the flower. A flower is defined as a reproductive unit. Pollen sacs help to produce pollen that are required for the landing on stigma and after landing on stigma they get inside the ovary of flower for further process.

Complete answer:
The development of haploid microspores from diploid microspore mother cells inside pollen sac by meiotic division is called microsporogenesis. The haploid microspores that get developed from a single microspore mother cell (pollen mother cell) are arranged in the form of four cells called microspore tetrad (haploid).

Now let us allow to find answer from given options:
A.Anther: the anther is generally bilobed in outline. Each anther is made up of four-sided tetragonal structure that is composed of four microsporangia present at corners and then microsporangia forms pollen sacs which on maturity produce pollen grains.
B.Pollen tube: it is a tube that carries pollen grain and transfers it to the ovary of a flower. It carries male gamete from pollen sac and transfers it for the further process.
C.Ovule: Ovary consists of an ovarian cavity with one or more chambers (locules). The placenta is present inside the ovarian cavity. developing from the placenta are the megasporangia, commonly called ovules. An ovary can possess a single Ovule as in wheat, rice, mango or many ovules as in papaya, watermelon and orchids.
D.None of these: as one of the options is correct this cannot be correct.

Hence, the correct answer is option (A)

Note: At the time when anthers mature and dehydrate, the microspores dissociate from each other and develop into pollen grains. Inside each microsporangium, many thousands of microspores or pollen grains are formed that are released with the dehiscence of anther.