Use this resource to trace the evolutionary relationships in phylogenetic trees for a few animals. Click through the opening screens, and then use the tools along the bottom of the resource to explore anatomy, development, and DNA of the animals in the set. Then find the pairs that are most closely related. When you are finished, list the three pairs of animals that are most closely related within their clade.

http://www. pbs. org/wgbh/evolution/change/family/in dex. html