The process of development of pollen mother cell into a mature pollen grain includes.

Options

A. Grain genesis
B. Microsporgenesis
C. Pollen genesis
D. Sporogenesis

Answer

To solve the question regarding the process of development of pollen mother cell into a mature pollen grain, we can break it down into the following steps:

### Step-by-Step Solution:

1. **Understanding Pollen Mother Cell**:
- The pollen mother cell, also known as microspore mother cell, is located in the anther of the flower. It is a diploid cell that undergoes meiosis to produce haploid microspores.

**Hint**: Remember that the pollen mother cell is the starting point for pollen grain development.

2. **Meiosis Process**:
- The pollen mother cell undergoes meiosis, which is a type of cell division that reduces the chromosome number by half. This results in the formation of four haploid microspores from one diploid pollen mother cell.

**Hint**: Meiosis is crucial for reducing the chromosome number and generating genetic diversity.

3. **Formation of Microspore Tetrad**:
- After meiosis, the four microspores remain attached in a cluster known as a microspore tetrad. This tetrad consists of four haploid microspores.

**Hint**: Think of the tetrad as a group of four cells that will eventually separate.

4. **Dissociation of Microspores**:
- The microspores then undergo a process where they dissociate from each other. This means that the four microspores separate and each one will develop into an individual pollen grain.

**Hint**: The separation of microspores is essential for the formation of individual pollen grains.

5. **Maturation into Pollen Grains**:
- Each microspore matures into a pollen grain. This maturation involves the development of the outer wall (exine) and the inner wall (intine) of the pollen grain, making it ready for fertilization.

**Hint**: Maturation is the final step where the microspores become functional pollen grains.

### Final Answer:
The process of development of pollen mother cell into a mature pollen grain includes **Microsporogenesis**, which encompasses meiosis, formation of microspore tetrads, dissociation of microspores, and maturation into pollen grains.