Question

Arrange the following in the correct developmental sequence related to microsporogenesis :
A. Microspore tetrads
B. Sporogenous tissue
C. Pollen grains
D. Pollen mother cells

• A. D, A, C, B
• B. B, D, C, A
• C. A, D, C, B
• D. B, D, A, C

Hint:

To remember the sequence: \textbf{S}porogenous $\rightarrow$ \textbf{M}other cell $\rightarrow$ \textbf{T}etrad $\rightarrow$ \textbf{P}ollen. (Think: \textbf{S}ome \textbf{M}others \textbf{T}each \textbf{P}atience).

Answer 1

The Correct Option is D

Microsporogenesis is the biological process by which pollen grains are formed within the anther of a flower. The sequential stages of this development are highly regulated:
• Sporogenous tissue (B): Initially, a young anther contains a mass of compactly arranged homogenous cells called sporogenous tissue located at the center of each microsporangium.
• Pollen mother cells (D): As the anther develops, the cells of the sporogenous tissue undergo modifications to become potential pollen mother cells (PMCs) or microspore mother cells.
• Microspore tetrads (A): Each PMC undergoes meiosis (reduction division) to produce a cluster of four haploid cells known as a microspore tetrad.
• Pollen grains (C): As the anther matures and dehydrates, the microspores dissociate from each other and develop into individual pollen grains, which represent the male gametophyte.