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Which was one of the first animals to develop a true body cavity? A.cnidarians B.flatworms C.mollusks D.sponges
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Which was one of the first animals to develop a true body cavity?

A.cnidarians
B.flatworms
C.mollusks
D.sponges

User Yaakov Ellis
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2 Answers

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C.................................mollusks
User Mehdi Hosseinzadeh
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4 votes
The answer is C. Mollusks. Hope this helps. :)
User Peter Lindholm
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