The class Reptilia is a group of species that share a common ancestor and some, but not all of its descendants. It is therefore considered ____.
A) monophyletic
B) polyphyletic
C) paraphyletic
D) an outgroup
E) a domain

Question

Quizplus · Accepted Answer

The class Reptilia is considered paraphyletic because it includes a common ancestor and some, but not all, of its descendants. This classification excludes birds, which are descended from a common ancestor of reptiles but are not traditionally classified as reptiles.

The Class Reptilia Is a Group of Species That Share