The time period in Earth's history that saw the greatest increase in both the number and diversity of species is the.

The time period in Earth's history that saw the greatest increase in both the number and diversity of species is the.

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The time period in Earth's history that saw the greatest increase in both the number and diversity of species is the.



A - Precambrian

B - Cambrian period

C - Mesozoic era

D - Cenozoic era


Answer: B - Cambrian period


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