In male cockroach, outermost layer of spermatophore is secreted by-

Options

A. Ejaculatory duct, during copulation
B. Phallic gland, during copulation
C. Mushroom gland, during copulation
D. Conglobate gland, after copulation

Answer

To answer the question regarding which gland secretes the outermost layer of the spermatophore in male cockroaches, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Spermatophore**:
- The spermatophore is a capsule that contains sperm and is produced by male cockroaches during mating.

2. **Identify the Glands Involved**:
- In male cockroaches, several glands are involved in the formation of the spermatophore:
- **Phallic Gland (Conglobate Gland)**: Known for secreting the outermost layer of the spermatophore.
- **Mushroom Gland (Utricular Gland)**: Responsible for forming the innermost layer of the spermatophore.
- **Ejaculatory Duct**: Conducts sperm but does not secrete the layers of the spermatophore.
- **Conglobate Gland**: Another name for the phallic gland.

3. **Determine the Correct Option**:
- The question asks for the outermost layer of the spermatophore specifically. According to the information, the **phallic gland** is responsible for secreting this outermost layer during copulation.

4. **Conclusion**:
- Therefore, the correct answer is that the outermost layer of the spermatophore in male cockroaches is secreted by the **phallic gland during copulation**.

### Final Answer:
The outermost layer of the spermatophore in male cockroaches is secreted by the **phallic gland during copulation**.

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