state the number of segments in earthworm which are covered by a prominent dark band or clitellum.

Explanation

To determine the number of segments in an earthworm that are covered by a prominent dark band known as the clitellum, follow these steps:

1. **Understand the Structure of Earthworm**: Earthworms belong to the phylum Annelida, which is characterized by metameric segmentation. This means their bodies are divided into numerous segments called metamers.

2. **Identify the Segments**: An earthworm typically has about 100 to 120 segments in total. The first segment is known as the peristomium.

3. **Locate the Clitellum**: The clitellum is a prominent dark band that is specifically located on certain segments of the earthworm.

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