Metameric segmentation is the characteristic of

Options

A. Mollusca and Chordata
B. Annelida and Arthropoda
C. Echinodermata and Annelida
D. Platyhelminthes and Arthropoda

Answer

**Step-by-Step Solution:**

1. **Understanding Metameric Segmentation**:
- Metameric segmentation refers to the division of an organism's body into repeated segments, both externally and internally. This means that the body is organized into a series of similar units or segments.

2. **Identifying Organisms with Metameric Segmentation**:
- To identify which organisms exhibit metameric segmentation, we can look at examples from the animal kingdom. Notably, earthworms are a classic example of metameric segmentation.

3. **Examples of Metameric Segmentation**:
- The two main groups of animals that display metameric segmentation are:
- **Annelids**: This includes earthworms and leeches, which have a segmented body structure.
- **Arthropods**: This group includes insects, arachnids, and crustaceans, which also have segmented bodies.

4. **Conclusion**:
- Therefore, the characteristic of metameric segmentation is primarily found in the phyla **Annelida** and **Arthropoda**.

**Final Answer**: Metameric segmentation is a characteristic of **Annelida** and **Arthropoda**.

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