Segments of earthworm are called

Options

A. Metamere
B. Sarcomere
C. Prostomium
D. Podomeres

Answer

To answer the question "Segments of earthworm are called," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Earthworm Structure**:
- Earthworms, such as the common Indian earthworm (scientific name: *Lumbricus terrestris*), have a cylindrical body that is distinctly segmented.

2. **Identifying the Segments**:
- The body of an earthworm is divided into more than a hundred segments. Each of these segments is structurally similar and plays a role in the earthworm's movement and function.

3. **Correct Terminology**:
- The segments of the earthworm are specifically referred to as "metameres." This term is used to describe the repeated segments that make up the body of the earthworm.

4. **Evaluating Other Options**:
- **Prostomium**: This is the first segment of the earthworm, which has sensory functions, but it is not a segment in the same sense as the metameres.
- **Podomere**: This term refers to segments in certain arthropods and is not applicable to earthworms.
- **Sarcomere**: This is the basic contractile unit of muscle fibers and is unrelated to the segmentation of earthworms.

5. **Conclusion**:
- Based on the definitions and the structure of the earthworm, the correct answer to the question is that the segments of an earthworm are called "metameres."

### Final Answer:
The segments of an earthworm are called **metameres**.

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