Earthworms do not possess

Options

A. A) mouth
B. B) anus
C. C) distinct head
D. D) genital pore

Explanation

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks which of the following structures is not present in earthworms. The options provided are mouth, anus, distinct head, and genital pore.

2. **Evaluate Each Option**:
- **Option A: Mouth**: Earthworms do have a mouth, which is located at the anterior end. This option is incorrect.
- **Option B: Anus**: Earthworms also have an anus, located at the posterior end of their body. This option is incorrect as well.
- **Option C: Distinct Head**: Earthworms do not have a distinct head like many other animals. Their body is segmented (metameric) and lacks a clearly defined head. This option is correct.
- **Option D: Genital Pore**: Earthworms possess genital pores for reproduction, which are present in both male and female earthworms. This option is incorrect.

3. **Conclusion**: Based on the evaluation, the correct answer is that earthworms do not possess a distinct head.

**Final Answer**: Earthworms do not possess a distinct head (Option C).

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