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    Exam 9: Annelids, Nematoda, Echinoderms, Primates, Biodiversity, and Speciation
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    Internal Body Cavities Is an Important Evolutionary Event
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Internal Body Cavities Is an Important Evolutionary Event

Question 76

Question 76

Multiple Choice

Internal body cavities is an important evolutionary event. The first body cavity observed in flatworms is called (a) an


A) acoelomate.
B) pseudocoelomate.
C) coelomate.

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