Thursday, April 9, 2009

Is the Precambrian Time apart of evolution?

I mean like...


does it involve evolution?



Every period involves evolution! Any time there is the presence of living organisms, evolution is occurring! For example, the Cambrian period began right after the end of the Precambrian. This periods was marked by an event of huge scientific importance dubbed "The Cambrian Explosion." Not a true explosion, but an amazing and eruptive divergence of evolution! The animal phyla that developed in the cambrian explosion would set the course of evolution for the next several hundred million years up until the present!


The Precambrian was a time where the first fish evolved, crustaceans called trilobites (which still exist, as horseshoe crabs) came into being, the first invertebrates, and countless others. It may have been a long time ago, but life was teeming and evolution was no doubt there!




Yes evolution occured during the Precambrian.





Precambrian is the period before about 540 million years ago. (to about 4 or 4.5 billion years ago).





During this time the first life appeared, and yes evolved. It was mostly single celled organisms, but they gradually become more varied, and some became more complex - through evolution. Towards the end of the precambrian, the first multi-celled organisms evolved. (fossils of them have only been recently, and are uncommon and not well-preserved)





In the subsequent Cambrian period, there was an explosion of diversity (the Cambrian explosion) in the variety and types of multi-celled organisms - all this was also due to evolution.

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