dinosaurs

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Issue:

Science

 

Written by:

James A

 

Date added:

July 10, 2015

 

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Grade:

B

 

No of pages / words:

2 / 348

 

Was viewed:

4562 times

 

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Essay content:

The three main periods of evolution in dinosaurs are the Triassic, Jurassic, and Cretaceous periods. The Triassic period of the Mesozoic era, roughly 205 ? 250 million years ago, was seen as a time of transition as dominant reptiles evolved on land as well as amphibious and marine animals of the sea...
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Due to the predominantly arid climate of the ecosystem at that time, cold-blooded reptiles gained dominance over warm-blooded mammal-like animals. The Triassic period also marked the induction of the Pterosaurs, which were flying reptiles. Beginning approximately 210 million years ago, the Jurassic period lasted for 70 million years of the Mesozoic Era...
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