All animals are heterotrophs that ingest their food. Somebiologists have speculated that the first animal to actively huntwas a flatworm-like animal. How are flatworms different from otherearly branches on the animal family tree-like sponges andjellyfish? How might active hunting of food have shaped the bodiesof animals via evolution? In your answer clearly state thesynapomorphies that characterize bilaterian animals and how thesetraits are related to hunting/active food acquisition.

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Flatworms Platyhelminthes are different from other early branches on the animal family tree such as sponges Porifera and jellyfish Cnidaria in several ... View the full answer