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What are annuli?...

What are annuli?

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**Step-by-Step Solution:** 1. **Definition of Annuli**: Annuli are ring-like grooves or structures found on the body of certain organisms, particularly in earthworms. 2. **Occurrence in Annelids**: Annuli are a prominent feature in the phylum Annelida, which includes earthworms and other segmented worms. 3. **Function of Annuli**: The annuli serve to divide the body of the organism into segments. This division is known as metameric segmentation. ...
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