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OpenStudy (anonymous):
All of the following have only one opening into their digestive system except: A. corals B. jellyfish C. roundworms D. sea anemones Help???????????
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OpenStudy (anonymous):
Not sure, but I think it is round worms. The key here is to see if the animal has both a mouth and an anus as both are openings into the digestive system.
OpenStudy (anonymous):
Oo ok thanks
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