What does the fossil record reveal? Your
O Only dinosaurs formed fossils
O Species evolve over time
Few organisms are extinct
O Mammals have dominated the Earth

Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.

The term equestrian relates to which animal? bulls cows horses pigs

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.