Male cockroach differs from female cockroach in having

Options

A. antennae
B. labrum
C. maxillae
D. anal styles

Explanation

To answer the question "Male cockroach differs from female cockroach in having," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Key Differences**: Start by understanding the anatomical differences between male and female cockroaches. The question specifically asks for a feature that is present in males but absent in females.

2. **Focus on Specific Structures**: The male cockroach has a specific structure known as the "annul style." This is a small, thread-like structure that is typically absent in female cockroaches.

3. **Consider Other Characteristics**: While there are other differences, such as body size and wing length, these are not unique to males. The male cockroach is generally smaller and has longer wings compared to the female, but these characteristics do not answer the question directly.

4. **Eliminate Incorrect Options**: If provided with multiple-choice options, eliminate those that are common to both sexes, such as antennae, labrum, and maxillae, as these structures are present in both male and female cockroaches.

5. **Conclude with the Correct Answer**: Based on the identification of the annul style as a distinguishing feature, we can conclude that the correct answer to the question is "annul style."

### Final Answer:
Male cockroach differs from female cockroach in having the annul style.

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