In an angiosperm, how many microspore mother cells are required to produce 100 pollen grains?

Options

A. 25
B. 50
C. 75
D. 100

Answer

To determine how many microspore mother cells are required to produce 100 pollen grains in an angiosperm, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Microspore Mother Cells**:
- Microspore mother cells (also known as pollen mother cells) are diploid cells that undergo meiosis to produce haploid microspores.

2. **Meiosis Process**:
- During meiosis, one microspore mother cell divides to form four haploid microspores. This is a key point because it tells us how many pollen grains can be produced from one microspore mother cell.

3. **Calculate the Number of Microspore Mother Cells Needed**:
- Since one microspore mother cell produces four microspores (which develop into pollen grains), we can set up the following calculation:
\[ \text{Number of Microspore Mother Cells} = \frac{\text{Total Pollen Grains}}{\text{Pollen Grains per Microspore Mother Cell}} = \frac{100}{4} = 25 \]

4. **Conclusion**:
- Therefore, to produce 100 pollen grains, **25 microspore mother cells** are required.

### Final Answer:
**25 microspore mother cells are required to produce 100 pollen grains.**

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