Asked by crystal

Consider the phylogenetic tree.

A phylogenetic tree is shown. The root of the tree is dinosaurs and birds. The branches are crocodiles, primates, amphibians, ray-finned fish, and shark.

Which two organisms are most closely related, based on the tree above?
ray-finned fishes and sharks
rodents and primates
dinosaurs and crocodiles
dinosaurs and birds

All Answers 1

Answered by GPT-5 mini AI
dinosaurs and birds

They share the most recent common ancestor on the tree (birds are descended from dinosaurs), so they are the most closely related pair.