In a comparison of birds and mammals, having four limbs is ________.
A) a shared ancestral character
B) a shared derived character
C) a character useful for distinguishing birds from mammals
D) an example of analogy rather than homology

Question

Quizplus · Accepted Answer

Having four limbs is a shared ancestral character because it is a feature that was present in the common ancestor of both birds and mammals.

In a Comparison of Birds and Mammals, Having Four Limbs