The wall of spermathophore consists of

Options

A. one layer
B. two layers
C. three layers
D. four layers

Answer

**Step-by-Step Solution:**

1. **Understanding the Spermatophore**: The spermatophore is a structure found in the male reproductive system of cockroaches. It is formed during the process of sperm storage and transfer.

2. **Identifying the Components**: The wall of the spermatophore consists of several layers. To understand these layers, we need to look at the glands involved in its formation.

3. **First Layer**: The innermost layer of the spermatophore is formed by a milky secretion from the utricular gland, which is also known as the mushroom gland due to its shape.

4. **Second Layer**: The middle layer is formed by the secretion from the cells of the ejaculatory duct. This duct carries the sperm from the seminal vesicle to the outside.

5. **Third Layer**: The outermost layer is formed by the secretion from the phallic gland, also known as the conglobate gland. This gland contributes to the outer protective layer of the spermatophore.

6. **Conclusion**: Therefore, the wall of the spermatophore consists of three distinct layers:
- The innermost layer from the utricular gland,
- The middle layer from the ejaculatory duct,
- The outermost layer from the phallic gland.

7. **Final Answer**: The correct answer is that the wall of the spermatophore consists of three layers.

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