Multiple Choice
Frogs differ from other land vertebrates in that _____.
A) the circulatory system does not play a role in respiration
B) they can also exchange gases through their skin
C) the respiratory surface is in their gills
D) they do not possess lungs
E) they take in oxygen through lungs but release carbon dioxide from gills
Correct Answer:

Verified
Correct Answer:
Verified
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