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The Living World 8th Edition by George Johnson
Edition 8ISBN: 978-0078024214The Living World 8th Edition by George Johnson
Edition 8ISBN: 978-0078024214 Exercise 11
What advancement in fish led to a more efficient circulatory system?
A) A muscular pump is first seen in fishes.
B) A closed circulatory system is first seen in fishes.
C) A heart with separate chambers is first seen in fishes.
D) A double-loop system is first seen in fishes.
A) A muscular pump is first seen in fishes.
B) A closed circulatory system is first seen in fishes.
C) A heart with separate chambers is first seen in fishes.
D) A double-loop system is first seen in fishes.
Explanation
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C. A heart with sepa...
The Living World 8th Edition by George Johnson
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