Question
A student places a fish and a frog in separate moist chambers and observes gas exchange. The frog can use its skin more effectively because amphibian skin is:
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Correct Answer: A. Thin, moist, and vascularized
Explanation:
Amphibian skin is thin, moist, and richly supplied with blood vessels, making cutaneous gas exchange possible. Fish rely mainly on gills, while frog skin can supplement respiration.
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