In cockroach arolium is helpful in:

Options

A. In digestion
B. Respiration
C. Locomotion
D. Reproduction

Answer

**Step-by-Step Solution:**

1. **Understanding Arolium**: The arolium is a small, pad-like structure found on the feet of cockroaches. It plays a significant role in how cockroaches move.

2. **Identifying Functions**: The question asks about the function of arolium in cockroaches. The options provided are Digestion, Respiration, Locomotion, and Reproduction.

3. **Analyzing the Options**:
- **Digestion**: Arolium does not play a role in the digestive system of cockroaches.
- **Respiration**: Arolium is not involved in the respiratory process of cockroaches.
- **Reproduction**: Arolium has no function related to reproduction in cockroaches.
- **Locomotion**: Arolium is crucial for locomotion, especially on rough surfaces.

4. **Function on Different Surfaces**:
- On **rough surfaces**, the arolium, along with claws, helps the cockroach grip and move effectively.
- On **smooth surfaces**, the cockroach uses its planulae (another structure) for movement.

5. **Conclusion**: Based on the analysis, the correct answer to the question is that the arolium is helpful in **Locomotion**.

**Final Answer**: Arolium is helpful in Locomotion.

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