Fossils of the earliest tetrapods should ________.
A) show evidence of internal fertilization
B) show evidence of having produced shelled eggs
C) indicate limited adaptation to life on land
D) feature the earliest indications of the appearance of jaws

Question

Quizplus · Accepted Answer

The earliest tetrapods were the first vertebrates to transition from aquatic to terrestrial habitats. As such, they are expected to show limited adaptation to life on land.

Note: None of the other choices are necessarily expected to be present in the fossils of the earliest tetrapods. Internal fertilization and shelled eggs evolved later in tetrapod evolution, and the appearance of jaws predates the evolution of tetrapods.

Fossils of the Earliest Tetrapods Should ________