What should be true of fossils of the earliest tetrapods?
A) They should show evidence of internal fertilization.
B) They should show evidence of having produced shelled eggs.
C) They should indicate limited adaptation to life on land.
D) They should be transitional forms with the fossils of chondrichthyans that lived at the same time.
E) They should feature the earliest indications of the appearance of jaws.

Question

Quizplus · Accepted Answer

The earliest tetrapods were still in the process of adapting to life on land, so their fossils should indicate limited adaptations to this new environment.

Answer: E
 Tetrapods were the first animals to develop true jaws, so their fossils should feature the earliest indications of this adaptation.

Answers A, B, and D are incorrect because there is no evidence to suggest that the earliest tetrapods exhibited these traits or that they are necessary for the evolution of tetrapods.

What Should Be True of Fossils of the Earliest Tetrapods