Biology, 24.12.2019 03:31, heintzelmanvp6ir6d

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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Which one of the following is a major difference between the circulatory systems of earthworms and f...