Question

What are some of the most important events in the history of life during Paleozoic Era? When did it begin and end? What six periods did it include? What marks the beginning of this Era? Which main event took place in mid-Paleozoic? Which major groups of animals (invertebrates and vertebrates) and plants evolved and became extinct? How did the Paleozoic Era end?

Answer 1

Some of the most important events in the historyof life during Paleozoic Era are

1. The appearance of most of the pordern phyla during the Cambrian explosion. Arthopods, molluscs, fish, amphibians, synapsids and diapsids all appeared during the Paleozoic Era.

2. Transition of life forms onto land by the end of Paleozoic era.

3. Primitive plants covered continents which latter formed the coal bed.

4. Apperance of first modern plants (conifers) by the end of the Era

The Paleozoic Era last from 541 to 251.902 million years ago.

The Paleozoic Era is subdivided into six different period- The Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian.

The first Period of Paleozoic Era was marked by an event known as Cambrian explosion which involved the evolution of largest number of organisms in any single period in the history of Earth. Geologically, Paleozoic Era starter just after the breakup of the supercontinent Pannotia.

During the mid-Paleozoic Era, the main event took place was Devonian Explosion. In the Devonian explosion, plants started making lignin, allowing taller growth and vascular tissue. During this explosion, the first tree appeared along with seeds bearing plants.

The rapid warming up of the ocean leading to The great dying mark the end of the era. During the great dying, 96% of all marine species and more than two thirds of terrestial species perished.