alleryMoist scaleless skin, a three-chambered heart and respiration through skin fit:
AReptilia
BAves
CAmphibia
DMammalia
Answer & Solution
Correct answer: C. Amphibia
Amphibians have moist skin without scales and a three-chambered heart. Respiration may involve gills, lungs and skin; digestive, urinary and reproductive tracts open into a cloaca.
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