What characteristic do all annelidas (ex: earthworms, leeches) have that is unique to this group? (Think about what they have that other animals do NOT have.)

Question

They are worms that have segments.

They have a digestive system.

They have a circulatory system.

They have a nervous system.

Answer 1

The characteristic that is unique to annelids (such as earthworms and leeches) is that they are worms that have segments. This segmentation is a defining feature of the phylum Annelida, setting them apart from other animal groups, as it allows for greater complexity and specialization of body parts.