During which era did the supercontinent Pangaea began to break up?

The current geologic period is called the ____.

What event may have triggered the great Paleozoic (Permain) extinction?

What happened to all the continents by the end of the Permain Period?

Mammals became dominant only after ____.

One group of reptiles, characterized by the fossil Archaeopteryx, led to the evolution of ____

In the early Paleozoic, life was only found in/on the ____.

Why did amphibians diversify so rapidly during the late Paleozoic?

Which period is known as the “age of fishes”?

Which of the following was NOT one of the changes in development and specialization that primitive mammals underwent?

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