Genital pouch in female cockroach is formed by _____sterna 

Options

A. `8^(th), 9^(th)`
B. `9^(th), 10^(th)`
C. `7^(th), 8^(th), 9^(th)`
D. `10^(th), 11^(th)`

Answer

To determine which sterna form the genital pouch in female cockroaches, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Cockroach Abdomen**:
- The abdomen of a cockroach consists of 10 segments, each with specific structures and functions.

2. **Identify Relevant Sterna**:
- The question specifically asks about the sterna that form the genital pouch in female cockroaches. The relevant sterna are the 7th, 8th, and 9th sterna.

3. **Examine the Shape and Function of Sterna**:
- The 7th sterna is described as boat-shaped. The 8th and 9th sterna also contribute to the structure of the genital pouch.

4. **Conclusion**:
- The genital pouch in female cockroaches is formed by the 7th, 8th, and 9th sterna together.

### Final Answer:
The genital pouch in female cockroach is formed by **7th, 8th, and 9th sterna**.

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