In the beginning of the Paleozoic Era, animals began to develop hard parts like shells and bones.
paleozoic
The Paleozoic era began about 543 million years ago. It came after the Precambrian era and before the Mesozoic era.
the PALEOZOIC era
No Paleozoic is not the second era it is the first era
Paleozoic Era
Paleozoic - climate change Mesozoic - meteor
Warm, shallow seas covered most of Earth's surface near the end of the Paleozoic Era.
The first period in the Paleozoic Era was the Cambrian.
The Paleozoic era was from 540 million years ago to about 245 million years ago. After that came the Mesozoic era, and that lasted from the end of the Paleozoic to 65 million years ago, when the earth entered the Cenozoic era.
The continents merged into a single supercontinent known as Pangaea during the Paleozoic and Mesozoic eras, specifically in the late Paleozoic era around 300 million years ago. This supercontinent began to break apart during the Mesozoic era, leading to the formation of the current continents.
The Permian period is the last period of the Paleozoic era