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Explain the meaning of the phrase "Cambrian Explosion"?
The Cambrian Explosion was the evolutionary event, beginning around 542 million years ago, during which most of the major animal phyla appeared relatively suddenly (hence "explosion"), [ as indicated by the fossil record. ]
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Asked 5/3/2015 12:39:17 PM
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Questions asked by dhammond
What is sedimentary rocks?
Weegy: Sedimentary rocks are types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water. (More)
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Updated 5/3/2015 3:35:51 PM
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What is selection pressure? User: What is mutation?
Weegy: A mutation is the act or process of being altered or changed. User: What is irreducible complexity? (More)
Question|Asked by dhammond
Updated 5/4/2015 3:26:37 AM
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Selection pressure can be regarded as a force that causes a particular organism to evolve in a certain direction.
Added 5/4/2015 3:25:38 AM
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Irreducible complexity is a term used to describe a characteristic of certain complex systems whereby they need all of their individual component parts in place in order to function.
Added 5/4/2015 3:26:37 AM
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