Which of these would a paleontologist most likely do to determine if a fossil represents a reptile or a mammal?
A) Look for the presence of milk-producing glands.
B) Look for the mammalian characteristics of a four-chambered heart and a diaphragm.
C) Use molecular analysis to look for the protein keratin.
D) Examine the teeth.

Question

Quizplus · Accepted Answer

Examine the teeth. One of the easiest ways to distinguish between reptilian and mammalian fossils is to examine their teeth. Mammals have teeth that are differentiated into several different shapes for different purposes, while reptiles have teeth that are all the same shape.

Which of These Would a Paleontologist Most Likely Do to Determine