In male cockroach, the ejaculatory duct opens into a pore situated ventral to anus. This pore is -

Options

A. Gonopore
B. Genital papilla
C. Nephridiopore
D. Peristomium

Answer

To answer the question regarding the pore in male cockroaches where the ejaculatory duct opens, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Male Reproductive System**:
- In male cockroaches, the reproductive system consists of a pair of testes located laterally in the abdomen, specifically in the sixth abdominal segment.

**Hint**: Remember that the male reproductive system includes structures that produce and transport sperm.

2. **Understand the Structure of the Reproductive Ducts**:
- Each testis is connected to a thin tube called the vas deferens. This duct is responsible for transporting sperm from the testes.

**Hint**: Think about how sperm travels from the testes to the outside of the body.

3. **Define the Ejaculatory Duct**:
- The vas deferens from each testis leads to the ejaculatory duct, which is the final duct through which sperm passes before exiting the body.

**Hint**: Consider what happens to sperm just before it is released from the body.

4. **Locate the Opening of the Ejaculatory Duct**:
- The ejaculatory duct opens into a specific pore located ventral (underneath) to the anus of the cockroach.

**Hint**: Visualize the anatomy of the cockroach to understand where this pore is situated.

5. **Identify the Correct Term for the Pore**:
- The pore where the ejaculatory duct opens is known as the **gonopore**. This is the correct term for the male reproductive opening in cockroaches.

**Hint**: Recall the terminology used in insect anatomy to identify reproductive structures.

### Final Answer:
The pore situated ventral to the anus in male cockroaches where the ejaculatory duct opens is called the **gonopore**.