The nutritive layer of microsporangia of Angiosperm i

Options

A. Endothecium
B. Exothecium
C. Sporogenous tissue
D. Tapetum

Answer

**Step-by-Step Solution:**

1. **Understanding Microsporangia**: Microsporangia are the structures in flowering plants (angiosperms) that produce pollen grains, which are the male gametes.

2. **Identifying Layers of Microsporangia**: Microsporangia consist of several layers. The outermost layer is the epidermis, followed by the endothecium, middle layer, and the innermost layer known as the tapetum.

3. **Function of Each Layer**:
- **Epidermis**: This is the outer protective layer that safeguards the microsporangium.
- **Endothecium**: This layer also serves a protective function.
- **Middle Layer**: The function of this layer is not primarily for nutrition.
- **Tapetum**: This is the innermost layer and is crucial for providing nutrition to the developing pollen grains.

4. **Conclusion**: The nutritive layer of microsporangia in angiosperms is the **tapetum**.

5. **Final Answer**: Therefore, the correct answer to the question is the **tapetum**.

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