In Cockroach , the organs sensitive to ground vibrations are

Options

A. Elytra
B. Anal styles
C. Anal cerci
D. Tarsus.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the organs in cockroaches that are sensitive to ground vibrations.

2. **Analyzing the Options**: The options provided are:
- Electra (another name for Tegmina)
- Anal Sty
- Anal Cerci
- Tarsus

3. **Evaluating Each Option**:
- **Electra (Tegmina)**: Tegmina are the forewings of the cockroach. They do not have receptors for ground vibrations, so this option is incorrect.

- **Anal Sty**: Anal sty are cutaneous structures found in male cockroaches. They are primarily involved in copulation and do not have receptors for ground vibrations, making this option incorrect as well.

- **Anal Cerci**: Anal cerci are segmented structures located at the posterior end of the cockroach. They are equipped with various receptors, including sound receptors and vibroreceptors, which are sensitive to vibrations. This makes this option the correct answer.

- **Tarsus**: The tarsus is part of the cockroach's legs and consists of segments known as tarsomeres. It does not have receptors for ground vibrations, so this option is also incorrect.

4. **Conclusion**: After evaluating all the options, the correct answer is **Anal Cerci**, as they contain receptors sensitive to ground vibrations.

**Final Answer**: The organs sensitive to ground vibrations in cockroaches are **Anal Cerci**.

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