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 thickened, glandular section of the earthworm's body. It is non-segmented and can be found in specific segments of the worm, typically between segments 32 and 37.

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

3. **Cocoon Formation**: During reproduction, the clitellum secretes a viscous fluid that forms a cocoon. This cocoon is where the eggs are deposited and subsequently develop.

4. **Clarifying Misconceptions**: The clitellum is not involved in copulation (the mating process), burrowing, or spermatogenesis (the formation of sperm). Its main role is in the reproductive process, specifically in cocoon formation.

5. **Conclusion**: Therefore, the clitellum of the earthworm is primarily concerned with the formation of cocoons for egg deposition.

### Final Answer:
The clitellum of the earthworm is concerned with cocoon formation for the deposition of eggs.

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