Main function of middle layer is

Options

A. Mechanical support
B. Protection
C. Storage of food
D. Dehiscence

Answer

### Step-by-Step Solution:

1. **Identify the Structure**: The question pertains to the middle layer of the anther, which is part of the microsporangium in flowering plants.

2. **Understand the Layers of Anther**: The anther consists of four layers:
- **Epidermis**: The outermost layer that provides protection.
- **Endothesium**: The layer responsible for dehiscence, which is the release of pollen grains.
- **Middle Layer**: The layer in question, which we need to analyze for its main function.
- **Tapetum**: The innermost layer that nourishes the developing pollen grains.

3. **Focus on the Middle Layer**: The middle layer is specifically responsible for storing reserve food material. This food is primarily stored in the form of starch.

4. **Evaluate the Options**: The options provided are:
- Mechanical support
- Protection
- Storage of food
- Dehiscence

5. **Analyze Each Option**:
- **Mechanical Support**: This is incorrect as it is a function of the epidermis.
- **Protection**: This is also incorrect as it pertains to the epidermis.
- **Storage of Food**: This is the correct answer as it aligns with the function of the middle layer.
- **Dehiscence**: This is incorrect as it is the function of the endothesium.

6. **Conclusion**: The main function of the middle layer of the anther is to store reserve food material, confirming that the correct answer is "Storage of food".