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:

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

Step 2: Determine the Yield per Microspore Mother Cell
During microsporogenesis, each diploid microspore mother cell undergoes a single meiotic division to produce a tetrad containing four haploid microspores.
Each of these microspores subsequently matures and develops into a functional pollen grain.
Therefore, we can write the relationship as:
$$1\text{ Microspore Mother Cell (MMC)}\to 4\text{ Pollen Grains}$$

Step 3: Calculate for 325 Microspore Mother Cells
Given that there are 325 microspore mother cells, we can calculate the total number of pollen grains formed by multiplying 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, a total of 1300 pollen grains will be formed.