Which of these would a palaeontologist 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

Examining the teeth can provide information about the type of diet and jaw structure, which can help determine if the fossil represents a reptile or a mammal. Milk-producing glands, a four-chambered heart, a diaphragm, and the presence of keratin are all characteristics unique to mammals and cannot be determined by examining a fossil alone.

Which of These Would a Palaeontologist Most Likely Do to Determine