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Author Question: The distinction between sponges and other animal phyla is based mainly on the ab (Read 906 times)

hummingbird

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on: Aug 2, 2013
The distinction between sponges and other animal phyla is based mainly on the absence versus the presence of
A) a body cavity.
B) a complete digestive tract.
C) a circulatory system.
D) true tissues.
E) mesoderm.


geoffrey

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Reply #1 on: Aug 3, 2013
Best answer would be D.


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hummingbird

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Reply #2 on: Aug 7, 2013
Great help lol Thanks


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