In cockroach

Options

A. Ejaculatory duct opens in phallic gland
B. Phallic gland stores sperms
C. Vas deferens opens in phallic gland
D. Phallic gland opens in left phallomere

Answer

To solve the question regarding the male reproductive system of a cockroach, we will analyze the components and their functions step by step.

### Step-by-Step Solution:

1. **Understanding the Male Reproductive System**:
- The male reproductive system of a cockroach consists of several key components: a pair of testes, vas deferentia, an ejaculatory duct, seminal vesicles, and a phallic gland.

2. **Identifying the Function of Each Component**:
- **Testes**: Produce sperm.
- **Vas deferentia**: Transport sperm from the testes.
- **Ejaculatory duct**: Carries sperm to the outside of the body.
- **Seminal vesicles**: Store sperm temporarily.
- **Phallic gland**: An accessory gland that secretes fluids that mix with sperm.

3. **Analyzing the Options**:
- **Option A**: "Ejaculatory duct opens in phallic gland" - This is incorrect because the ejaculatory duct opens at the gonopore, not in the phallic gland.
- **Option B**: "Phallic gland stores sperms" - This is incorrect as the phallic gland does not store sperm; it is an accessory gland.
- **Option C**: "Vas deferens opens in phallic gland" - This is also incorrect; the vas deferens does not open in the phallic gland.
- **Option D**: "Phallic gland opens in left phallomere" - This statement is correct as the phallic gland does indeed open into the left phallomere.

4. **Conclusion**:
- Based on the analysis of the options, the correct answer is **Option D: Phallic gland opens in left phallomere**.