A)Change in oxygen content
B)Regulation of body temperature in a more extreme environment
C)Wider diversity of habitats
D)About 1000 times less buoyant density and 50 times less viscosity than water
E)All of the choices are challenges of life out of water

A)Internal fertilization after the female has picked up spermatophores deposited by the male in the environment
B)External fertilization in the water similar to fish
C)Internal fertilization by copulation with a male
D)External fertilization in the water similar to frogs utilizing amplexus
E)None of the choices is correct

A)refers to the organisms that form the superclass Tetrapoda.
B)includes the amphibians and amniotes.
C)does not include the fish.
D)includes humans.
E)All of these choices are correct.