What is the chart with Precambrian, Paleozoic, Mesozoic, and Cenozoic eras called?

How does the fossil record apply to the answer to number 1?

What factors affect natural selection?

Describe the process in which most fossils form.

What do scientists use to determine evolutionary relationships among organisms?

Identify one way in which the bones of a turtle, alligator and bird's extremities are similar.

What do these similarities provide evidence of? What can you infer about turtles, alligators, and birds from these similarities?

A continent pulls apart, and the parts become separated by an ocean. How could this event affect the species of organisms that populated the original continent?

Scientists find a fossil in a rock layer near the bottom of a canyon. They find a fossil in a rock layer near the top of the canyon. Which fossil is probably older? Explain how you know, and identify the kind of dating you are using.

Compare and contrast the theories of gradualism and punctuated equilibria (equilibrium).

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