Precambrian and Paleozoic Eras

Front

What era is characterized by shallow seas covering large parts of the continents?

Back

Paleozoic Era

Front

What significant event occurred at the end of the Paleozoic Era involving marine and land species?

Back

More than 90% of all marine species and 70% of all land species died off.

Front

During which era are traces of life much easier to find?

Back

Paleozoic Era

Front

Which group of animals evolved during the Paleozoic Era?

Back

Amphibians

Front

What major transition occurred for plants and amphibians during the Paleozoic Era?

Back

They first moved to land.

Front

What is the time period before the Paleozoic Era called?

Back

Precambrian Time

Front

What type of life forms were predominant during the Precambrian Time?

Back

Simple, single-celled organisms.

Front

What major geological feature was common during the Paleozoic Era?

Back

Extensive shallow seas.

Front

What is one of the key characteristics of the Paleozoic Era in terms of biodiversity?

Back

A significant increase in the diversity of life forms.

Front

What major extinction event marks the end of the Paleozoic Era?

Back

The Permian-Triassic extinction event.