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A very large mass extinction in which trilobites and amphibians disappeared occurred at the end of the a. Precambrian Era. b. Cambrian Period. c. Paleozoic Era. d. Quaternary Period.
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A very large mass extinction in which trilobites and amphibians disappeared occurred at the end of the

a. Precambrian Era.
b. Cambrian Period.
c. Paleozoic Era.
d. Quaternary Period.

User CD Jorgensen
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1 Answer

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I think it is c Paleozoic era
User IrJvV
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