Question #117984

Compare and contrast the three “worm” phyla (Platyhelminthes, Nematoda and Annelida).

Expert's answer

Flatworms (phylum Platyhelminthes) are simple animals that are slightly more complex than a cnidarian. Roundworms (phylum Nematoda) have a slightly more complex body plan. Segmented worms (phylum Annelida) are the most complex animals with worm-like body plans.


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