Chapter 29, Problem 11RQ

To determine

The periods of the Paleozoic era.

Answer to Problem 11RQ

The Paleozoic era is divided into six periods that are the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian period.

Explanation of Solution

The Paleozoic time era began around 543 million years ago, and it lasted about 295 million years ago.

During this time, sea-level fluctuations occurred several times and several areas of the Earth were covered by the sea and oceans due to an increase in the water level. And this results in the evolution of marine life in this era. So the new feature evolved and it is later named as shelled organism. It is more informative than Precambrian time.

The Paleozoic era is divided into six periods that are the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian period.

Conclusion:

Therefore, The Paleozoic era is divided into six periods that are the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian period.