Which one shows meiosis

Options

A. Root tip
B. Archesporium
C. Pollen grain
D. Anther.

Answer

To determine which option shows meiosis, we need to analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Meiosis**:
- Meiosis is a type of cell division that reduces the chromosome number by half, resulting in four haploid cells (n) from one diploid cell (2n). This process is essential for the formation of gametes (sperm and eggs).

2. **Analyzing the Options**:
- **Option 1: Root Tip**:
- The root tip is involved in growth and does not produce gametes. It undergoes mitosis for growth and is not a site for meiosis. Therefore, this option does not show meiosis.

- **Option 2: Argiopore (Argisporium)**:
- Argisporium refers to a group of cells that develop from a spore mother cell. It is not a sex organ and does not directly produce gametes. Thus, it does not undergo meiosis. This option is also incorrect.

- **Option 3: Pollen Grain**:
- Pollen grains are the male gametophytes of flowering plants. They are already in the haploid (n) state and do not undergo meiosis since they are the result of meiosis. Therefore, this option does not show meiosis.

- **Option 4: Anther**:
- The anther is part of the stamen (the male reproductive organ of a flower) and is responsible for producing pollen grains. The pollen grains develop from diploid (2n) cells in the anther through the process of meiosis, resulting in haploid (n) pollen grains. Thus, this option shows meiosis.

3. **Conclusion**:
- The correct answer is **Option 4: Anther**, as it undergoes meiosis to produce pollen grains.