Nereis possesses lateral appendages called parapodia which help in

Options

A. Locomotion
B. Swimming
C. respiration
D. All of these

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism**:
- Nereis is a type of annelid worm that belongs to the phylum Annelida and the class Polychaeta.

2. **Understand Parapodia**:
- Parapodia are lateral appendages found on the body segments of Nereis. They are typically fleshy and can be described as paddle-like structures.

3. **Functions of Parapodia**:
- Parapodia serve multiple functions:
- **Locomotion**: They assist in movement by allowing the organism to crawl along surfaces.
- **Swimming**: Parapodia can also help Nereis swim in water by moving in a coordinated manner.
- **Respiration**: They play a role in gas exchange, allowing the organism to breathe by increasing the surface area for respiration.

4. **Evaluate the Options**:
- The question provides options: locomotion, swimming, respiration, and all of these.
- Since parapodia are involved in all three functions, the correct answer is "all of these."

5. **Conclusion**:
- Therefore, Nereis possesses lateral appendages called parapodia which help in locomotion, swimming, and respiration. The final answer is "all of these."

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