Question

part iv: annelids
describe a distinctive feature of the annelids and give an example of an organism that shows this feature.

Explanation:

Annelids are defined by segmented body plans, called metamerism, where the body is divided into repeated, similar segments (metameres) with shared internal structures. This segmentation enhances movement and bodily function specialization.

Answer:

A distinctive feature of annelids is metameric segmentation—their bodies are divided into a series of identical, repeating segments (metameres) that each contain a portion of the digestive, nervous, and circulatory systems. An example of an annelid with this feature is an earthworm (Lumbricus terrestris), whose long body is clearly divided into many visible ring-like segments.