Clitellum of earthworm is concerned with

Options

A. Copulation
B. Cocoon formation
C. Burrowing
D. Spermatogenesis

Answer

**Step-by-Step Solution:**

1. **Understanding the Clitellum**: The clitellum is a distinct, thickened, and glandular region found in certain annelids, including earthworms. It is typically light-colored and is located in segments 14 to 16 of the earthworm's body.

2. **Function of the Clitellum**: The primary function of the clitellum is related to reproduction. It plays a crucial role in the process of copulation and the formation of a cocoon for the fertilized eggs.

3. **Role in Copulation**: During copulation, the clitellum secretes mucus that helps in the alignment of two earthworms. This mucus facilitates the exchange of sperm between the two individuals.

4. **Cocoon Formation**: After copulation, the clitellum also secretes a protective cocoon where the eggs are deposited. However, the question specifically asks about the clitellum's primary concern, which is copulation.

5. **Conclusion**: Therefore, the clitellum of the earthworm is primarily concerned with copulation, as it is involved in the reproductive process by aiding in sperm exchange and the formation of a cocoon for eggs.

**Final Answer**: The clitellum of the earthworm is concerned with copulation.

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