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OpenStudy (xofallenangelox):
Which one of the following is a major difference between the circulatory systems of earthworms and fish? A. Fish have a single central heart; earthworms have several hearts. B. Earthworms have a single central heart; fish have several hearts. C. Fish have five pairs of auxiliary hearts; earthworms have one pair of auxiliary hearts. D. Earthworms have five pairs of auxiliary hearts; fish have one pair of auxiliary hearts.
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OpenStudy (xofallenangelox):
I don't know which science this correctly belongs in, but... Can someone please answer this question??? Will medal and fan.
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