amberspires105 amberspires105

03-11-2016
Biology

contestada

The ancient fossils are a record of when shallow seas covered much of the United States. While the fossils are of organisms that are the precursors of many modern day organisms, changes in ocean geography and other factors eventually caused those older species to become?

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bubba2k16 bubba2k16

03-11-2016

the answer is extinct

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