Choose the option that gives the correct number of pollen grains that will be formed after 325 microspore mother cells undergo microsporogenesis.

The correct option is 1300.

To understand why this is the correct answer, let us break down the process of microsporogenesis step-by-step:

1. Definition of Microsporogenesis:
Microsporogenesis is the process of the formation of microspores (which develop into pollen grains) from a pollen mother cell (PMC) or microspore mother cell (MMC) through meiotic division (meiosis).

2. Division of a Single Microspore Mother Cell:
Each microspore mother cell is diploid (2n) and undergoes a single meiotic division (meiosis) to produce a microspore tetrad. A microspore tetrad consists of four haploid (n) microspores.
Each of these four microspores eventually matures and separates to form a functional pollen grain.

Therefore, we can write the relationship as:
$$1\text{ Microspore Mother Cell (MMC)}\to 4\text{ Pollen Grains}$$

3. Calculation for 325 Microspore Mother Cells:
To find the total number of pollen grains formed from 325 microspore mother cells, we multiply the number of mother cells by the number of pollen grains produced per cell:
$$\text{Total Pollen Grains}=325\times 4$$
$$\text{Total Pollen Grains}=1300$$

Thus, 325 microspore mother cells will yield exactly 1300 pollen grains after undergoing microsporogenesis.