The single ventricle in an amphibian heart means the oxygenated and deoxygenated blood mix. How do amphibians manage to survive despite this inefficiency?
A. They keep their body temperatures high.
B. They move very slowly.
C. They transport oxygen across the skin.
D. They keep gills into adulthood.
E. They absorb large amounts of fluid.
Answer: C
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Fill in the blank with the appropriate word.
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