Number of sterna visible in female Cockroach is

Options

A. Ten
B. Nine
C. Eight
D. Seven

Answer

To determine the number of sterna visible in a female cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Cockroach Abdomen**:
- The abdomen of both male and female cockroaches consists of 10 segments.

2. **Identify the Sterna**:
- Sterna are the ventral (belly side) plates of the abdominal segments.

3. **Count the Visible Sterna in Females**:
- In female cockroaches, 7 sterna are visible. This is a specific characteristic of female cockroaches.

4. **Examine the 7th Sternum**:
- The 7th sternum in females is boat-shaped and is significant because it, along with the 8th and 9th sterna, forms the genital pouch.

5. **Conclusion**:
- Therefore, the total number of sterna visible in a female cockroach is 7.

### Final Answer:
The number of sterna visible in female cockroaches is **7**.

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