Number of somites present in earthworm are :

Options

A. 18537
B. 100-120
C. 200-300
D. 150-250

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the number of somites present in an earthworm. Somites are segments of the body that are characteristic of certain animal phyla, including annelids.

2. **Identifying the Organism**: The earthworm belongs to the phylum Annelida. This phylum is known for its segmented body structure, which is a key feature of annelids.

3. **Defining Metamerism**: In annelids, the body is divided into short, similar segments known as metamers. This segmentation is a defining characteristic of the phylum.

4. **Counting the Segments**: In mature earthworms, the body is typically divided into approximately 100 to 120 segments. Each of these segments corresponds to a somite.

5. **Evaluating Options**: The options provided are:
- A) 18537
- B) 100 to 120
- C) 200 to 300
- D) 150 to 250

Based on the information gathered, option B (100 to 120) is the correct answer.

6. **Conclusion**: Therefore, the number of somites present in an earthworm is 100 to 120.

**Final Answer**: The number of somites present in earthworm is 100 to 120.

---