Prostatic secretion is used in earthworm for

Options

A. Sperm activation
B. Ootheca
C. Spermatophore layer
D. Copulation

Answer

**Step-by-Step Solution:**

1. **Identify the Structure**: In earthworms, the prostatic glands are present on either side of the gut, extending from the 17th to the 19th segment.

2. **Understand the Function**: The primary function of the prostatic glands is to secrete prostatic fluid.

3. **Determine the Role of Prostatic Secretions**: The prostatic secretions play a crucial role in the male reproductive system of earthworms. They are responsible for activating sperm and aiding in sperm motility.

4. **Evaluate the Options**: The question provides several options regarding the use of prostatic secretion:
- Sperm activation
- Ootheca
- Spermatophore layer
- Copulation

5. **Select the Correct Answer**: Based on the function of prostatic secretions, the correct answer is "sperm activation," as it directly relates to the activation and motility of sperm.

**Final Answer**: Prostatic secretion is used in earthworm for **sperm activation**.

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