The number of male prothallial cells in Selaginella are

Options

A. One
B. Two
C. Three
D. Four.

Answer

To determine the number of male prothallial cells in Selaginella, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Male Gametophyte in Selaginella**:
- The male gametophyte in Selaginella is formed from the microsporangium.

2. **Identify the Total Number of Cells in the Male Gametophyte**:
- It is known that the male gametophyte consists of a total of 13 cells.

3. **Break Down the Types of Cells Present**:
- Among these 13 cells, there are specific types:
- 4 primary androgel cells
- 8 peripheral jacket cells

4. **Calculate the Remaining Cells**:
- Adding the primary androgel cells and the peripheral jacket cells gives us:
- 4 (androgel cells) + 8 (jacket cells) = 12 cells
- Since the total number of cells is 13, we can find the remaining cell:
- 13 (total cells) - 12 (known cells) = 1 remaining cell.

5. **Identify the Remaining Cell**:
- The remaining cell is identified as the male prothallial cell.

6. **Conclusion**:
- Therefore, the number of male prothallial cells in Selaginella is 1.

### Final Answer:
The number of male prothallial cells in Selaginella is **1**.

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