Metameric segmentation is exhibited by which of the following animal?

Options

A. Adamsia
B. Euspongia
C. Ascaris
D. Pheretima

Explanation

**Step-by-Step Solution:**

1. **Understanding Metameric Segmentation:**
- Metameric segmentation refers to the division of an organism's body into a series of repetitive segments or metameres. This feature is primarily found in certain animal phyla.

2. **Identifying the Options:**
- The options provided are:
- A. Adamsia
- B. Euspongia
- C. Ascaris
- D. Ferritema

3. **Analyzing Each Option:**
- **Adamsia:** This is a sea anemone, which does not exhibit metameric segmentation. Sea anemones belong to the phylum Cnidaria and have a different body structure.
- **Euspongia:** This is a type of sponge belonging to the phylum Porifera. Sponges do not have metameric segmentation; instead, they have a porous body structure.
- **Ascaris:** This organism is a roundworm (not a flatworm) and belongs to the phylum Nematoda. It does not exhibit metameric segmentation; instead, it has a cylindrical body.
- **Ferritema (Earthworm):** This organism belongs to the phylum Annelida, which is characterized by metameric segmentation. Earthworms have a segmented body structure, making them the correct answer.

4. **Conclusion:**
- The animal that exhibits metameric segmentation from the given options is **Ferritema (Earthworm)**.

**Final Answer:** Ferritema (Earthworm)

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