Which of the following are characteristic of amphibians? The skin is a respiratory organ. Melanin may be found in the liver. The cloaca serves the urinary and intestinal systems. Amphibians lack a diaphragm. Adults are generally carnivorous. All of the above

Which of the following are characteristic of amphibians?

The skin is a respiratory organ.
Melanin may be found in the liver.
The cloaca serves the urinary and intestinal systems.
Amphibians lack a diaphragm.
Adults are generally carnivorous.
All of the above

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