In Pinus, pollen grains develop inside

Options

A. Anther
B. Tapetum
C. Pollen chamber
D. Microsporangium.

Answer

**Step-by-Step Solution:**

1. **Understanding Pollen Grain Development**:
- Pollen grains are the male gametophytes in seed plants, including Pinus (a genus of conifers).
- To answer the question, we need to identify where these pollen grains develop.

2. **Identifying the Correct Structure**:
- The options provided are:
- Option 1: Anther
- Option 2: Teptum
- Option 3: Pollen chamber
- Option 4: Microsporangium
- We need to determine which of these structures is responsible for the development of pollen grains in Pinus.

3. **Analyzing Each Option**:
- **Anther**: This is part of the flower in angiosperms and is not present in Pinus, which is a gymnosperm.
- **Teptum**: This is a nourishing tissue found in the anther, not relevant to Pinus.
- **Pollen Chamber**: This is a space where pollen grains may be stored, but it is not where they develop.
- **Microsporangium**: This is the structure where pollen grains develop. In Pinus, the microsporangium contains microspore mother cells that undergo meiosis to produce pollen grains.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Microsporangium**, as this is the structure where pollen grains develop in Pinus.

**Final Answer**: In Pinus, pollen grains develop inside **Microsporangium**.

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