Evidence for Evolution

What is a homologous structure?

When parts of the body are similar in structure but have different functions (a result of divergent evolution)

What is a vestigial structure?

The structures that have been reduced in size and function but may once have been complete and functional

Will humans that share a closer evolutionary relationship exhibit a higher or lower degree of similarity in their DNA?

Higher

What does it symbolize when different species develop in similar ways?

They may have had a common ancestor

What are fossils?

Preserved remains of organisms

What does gradualism mean?

Change happens slowly and gradually over a long period of time

What does punctuated equilibrium mean?

That species often experience long periods of little or no significant change

When does punctuated equilibrium happen?

Usually when there is a big change in the environment