Define metameric segmentation.

Explanation

**Step-by-Step Solution:**

1. **Definition of Metameric Segmentation**: Metameric segmentation refers to the division of an animal's body into a linear series of similar segments or parts. Each of these segments is known as a "metamer."

2. **Characteristics of Metameric Segmentation**: In metameric segmentation, organs and tissues are repeated at regular intervals along the length of the body. This means that each segment can contain similar structures, which can aid in the functionality and adaptability of the organism.

3. **Examples of Metameric Segmentation**: This type of segmentation is prominently observed in annelids (segmented worms), such as earthworms. In these organisms, the body is distinctly divided into segments that can be identified as the head, body, and tail regions.

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