19

Phylogeny and Vertebrate Evolution

1. Humans and chimpanzees evolved from a common ancestor.

2.

a. Node 3

b. Species A

3.

4. Species E is most closely related to species D.

5. Lungs and four limbs

6.

a. Salmon

b. Node X

7. b. Phylogenetic trees do not consider time (only common ancestry).