Multiple Choice
In vertebrate animals, functional separation of deoxygenated and oxygenated blood
A) is called countercurrent circulation.
B) enhances the efficiency of gas exchange.
C) allows stronger contractions of the heart.
D) allows gas exchange by diffusion.
E) is advantageous when air-breathing vertebrates are submerged.
Correct Answer:
Verified
Correct Answer:
Verified
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