Fact 1: Amphibians have permeable skin that easily absorbs substances from the environment. Fact 2: Amphibian skin lacks hair or scales. Given the two facts above, what do amphibians lack?
Pick your answer from:
(I) brain
(II) fat
(III) hair
(IV) power
(V) oxygen
(VI) lungs
(VII) nectar
(VIII) skin
(III)