A clade is a group of organisms that share a common ancestor and includes all of its descendants. This means that a clade is based on phylogeny (evolutionary relationships), rather than on shared morphology, interbreeding, or genetic similarity (although these may be used as evidence of phylogeny). Therefore, choice B is the best answer.

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What Is a Clade

Question 39

Multiple Choice

What is a clade?

A) a group of individuals that share a similar morphology
B) a group of individuals that share a similar phylogeny
C) a group of individuals that interbreed successfully
D) a group of individuals that are genetically similar

Correct Answer: