The Paleozic Era
This era followed the Precambrian time
What made it deffernt?
What events orrcured.
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please help me
http://www.ucmp.berkeley.edu/paleozoic/paleozoic.php
http://www.forestencyclopedia.net/p/p1541
The Paleozoic Era was a geologic time period that followed the Precambrian time and spanned from around 541 million years ago to 252 million years ago. It is known as one of the most important periods in Earth's history, as it marks the emergence of complex life forms and major diversification of organisms.
What made the Paleozoic Era different from the preceding Precambrian time were several significant events and developments:
1. Cambrian Explosion: The Cambrian period, which occurred at the beginning of the Paleozoic Era, witnessed a rapid diversification and emergence of many new animal species. This event, known as the Cambrian Explosion, is considered one of the most important events in the history of life on Earth.
2. Evolution of Fishes: The Paleozoic Era witnessed the evolution and radiation of fishes, which were the first vertebrates to appear on Earth. Initially, these fishes were jawless, but later in the era, jawed fishes (gnathostomes) emerged, including the early sharks and bony fishes.
3. Land Colonization: One of the most significant events in the Paleozoic Era was the colonization of land by plants and animals. Early vascular plants like mosses and ferns began to appear on land in the Silurian period, followed by the evolution of seed-bearing plants in the Devonian period.
4. Age of Invertebrates: The Paleozoic Era is often referred to as the "Age of Invertebrates" because it saw the diversification and dominance of various invertebrate groups. These include trilobites, brachiopods, bryozoans, crinoids, and corals. Many of these organisms later became extinct during mass extinction events at the end of the era.
5. Mass Extinctions: The Paleozoic Era was marked by several mass extinction events, including the Ordovician-Silurian mass extinction and the Permian-Triassic mass extinction. The latter event, known as the Great Dying, was the most severe mass extinction in Earth's history, where around 96% of marine species and 70% of terrestrial species went extinct.
These are just a few of the major events and developments that occurred during the Paleozoic Era. It was a time of significant evolutionary milestones and shaped the subsequent development of life on Earth.