Microsporogenesis Developmental Sequence

Microsporogenesis is the process of formation of microspores (which develop into pollen grains) within the anthers of a flower. The correct developmental sequence involves specific stages.

Understanding the Stages

1. Sporogenous tissue (B): This is the initial diploid tissue present in the microsporangium responsible for producing microspores.
2. Pollen mother cells (D): Cells within the sporogenous tissue differentiate into specialized cells called pollen mother cells or microsporocytes. These are also diploid.
3. Microspore tetrads (A): Each pollen mother cell undergoes meiosis (a type of cell division reducing chromosome number by half) to form four haploid microspores, arranged in a tetrad.
4. Pollen grains (C): The microspores in the tetrad eventually separate and develop into mature haploid pollen grains through mitosis.

Correct Sequence

Based on the developmental process, the correct order is:

Sporogenous tissue (B) → Pollen mother cells (D) → Microspore tetrads (A) → Pollen grains (C)

Therefore, the correct option is B, D, A, C.