General Biology
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The bivalved condition of the shell in both brachiopods and bivalve mollusks is an example of ______________.
Lophophorates have lopophores which surround their ______.
Unlike gills, a radula, and distinct cephalization, the mantle is found in:
Annelids have a _____ digestive system, whereas platyhelminthes have a _____ digestive system.