Middle layers of microspongia are present between:

Options

A. Epidermis and endothecium
B. Endothecium and tapetum
C. Epidermis and tapetum
D. Inside the tapetum

Answer

To answer the question regarding the position of the middle layers of microsporangia, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Microsporangia Structure**: Microsporangia are structures found in the anthers of flowering plants where pollen grains are produced. They have a specific arrangement of layers.

2. **Identifying the Layers**: The microsporangium consists of four wall layers:
- **Epidermis**: The outermost layer that provides protection.
- **Endothecium**: The layer beneath the epidermis, also providing support and protection.
- **Middle Layers**: These are the layers located between the endothecium and the tapetum.
- **Tapetum**: The innermost layer that nourishes the developing pollen grains.

3. **Locating the Middle Layers**: The middle layers are specifically situated between the endothecium and the tapetum. Therefore, they are not found between the epidermis and endothecium or between the epidermis and tapetum.

4. **Conclusion**: Based on the arrangement of these layers, we can conclude that the middle layers of microsporangia are present between the endothecium and the tapetum.

### Final Answer:
The middle layers of microsporangia are present between the **Endothecium and Tapetum**.

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