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Strcture that help in swimming in Nerei...

Strcture that help in swimming in Nereis

A

pseudopodia

B

tentacles

C

parapodia

D

tube feet

Text Solution

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The correct Answer is:
### Step-by-Step Solution: 1. **Identify the Organism**: The question asks about the structure that helps in swimming in Nereis, which is a type of marine annelid. 2. **Understand Locomotion in Aquatic Animals**: Aquatic animals have specialized structures that aid in their movement through water. For Nereis, the focus is on how it swims. 3. **List Possible Structures**: The options provided include absinthal, pseudopodia, tentacles, parapodia, and tube feet. We need to determine which of these structures is involved in swimming. 4. **Identify the Correct Structure**: Among the options, the correct structure that aids in swimming for Nereis is **parapodia**. 5. **Explain the Function of Parapodia**: Parapodia are lateral extensions of the body segments in Nereis. They contain both longitudinal and circular muscles, which facilitate movement. The coordinated contraction of these muscles allows Nereis to swim effectively in its aquatic environment. 6. **Conclusion**: Therefore, the structure that helps in swimming in Nereis is **parapodia**.
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