Worms all appear to be closely related but have distinct evolutionary histories, resulting in the classification of worms into ________ phyla.

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Worms are classified into three main phyla - Platyhelminthes (flatworms), Nematoda (roundworms), and Annelida (segmented worms). While they share some similarities, there are significant differences in their anatomical structures and reproductive systems that suggest they have distinct evolutionary histories.

Worms All Appear to Be Closely Related but Have Distinct