Number of visible sternum present at the abdomen of female cockroach is:

Options

A. 6
B. 7
C. 8
D. 9

Answer

To determine the number of visible sternum present at the abdomen of a female cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Anatomy of Cockroaches**:
- Cockroaches have a segmented body that includes the head, thorax, and abdomen. The abdomen is further divided into segments.

2. **Identifying the Sternum**:
- The sternum refers to the ventral (belly side) plates of the abdomen. In cockroaches, these are the sternal segments that can be observed externally.

3. **Differentiating Between Male and Female Cockroaches**:
- It is important to note that male and female cockroaches have different anatomical features. Males have anal styles, while females do not.

4. **Counting the Visible Sternum in Females**:
- In female cockroaches, there are a total of 10 abdominal segments. However, not all segments are visible as sternum.
- Females have 7 visible sternum.

5. **Conclusion**:
- Therefore, the number of visible sternum present at the abdomen of a female cockroach is **7**.

### Final Answer:
The number of visible sternum present at the abdomen of a female cockroach is **7**.

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