Question

Arrange the following terms in the correct developmental sequence:Pollen grain, sporogenous tissue, ruicrospore tetrad, pollen mother cell,male gametes.

Answer 1

The correct development sequence is as follows:

Sporogenous tissue – pollen mother cell – microspore tetrad – Pollen grain – male gamete

During the development of microsporangium, each cell of the sporogenous tissue acts as a pollen mother cell and gives rise to a microspore tetrad, containing four haploid microspores by the process of meiosis (microsporogenesis). As the anther matures, these microspores dissociate and develop into pollen grains. The pollen grains mature and give rise to male gametes

Answer 2

Sporogenous tissue→pollen mother cell→ microspore tetrad→pollen grain→male gamete

Explanation:

• The sporogenous tissue give rise to number of pollen mother cells.
• During microsporogenesis the nucleus of each pollen mother cell undergoes meiosis and give rise to four haploid nuclei.
• These microspore tetrads sep[arate from each other and develop into microspores or pollen.
• The pollen grain contain two gametes.