In cockroach anal styles are present on :

Options

A. Ninth sternite of female
B. Ninth sternite of male
C. Tenth sternite of male
D. Both (1) and (2)

Answer

To solve the question regarding the presence of anal styles in cockroaches, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the location of anal styles in cockroaches. We need to identify whether they are present in males, females, or both.

2. **Identifying the Gender**: It is important to note that anal styles are specific to male cockroaches. This means that we can eliminate any options that suggest their presence in females.

3. **Locating the Sternite**: The anal styles are located on the ventral surface of the cockroach, specifically on the sternite. The sternite is the sclerite found on the ventral side of the body segments.

4. **Identifying the Correct Segment**: The anal styles are found on the 9th sternite of male cockroaches. This is a crucial detail that confirms the correct answer.

5. **Evaluating the Options**:
- **Option 1**: 9th sternite of female - Incorrect, as anal styles are absent in females.
- **Option 2**: 9th sternite of male - Correct, as anal styles are present here.
- **Option 3**: 10th sternite of male - Incorrect, as anal styles are not found here.
- **Option 4**: Both 1 and 2 are wrong - Incorrect, since option 2 is correct.

6. **Conclusion**: Based on the analysis of the options, the correct answer is that anal styles are present on the 9th sternite of male cockroaches.

### Final Answer:
Anal styles are present on the 9th sternite of male cockroaches.

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