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Question

Life began on earth in .

A
azoic eon
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B
achaeozoic eon
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C
proterozoic eon
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D
phanarezoic eon
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Solution

The correct option is B achaeozoic eon
There are four eons in the geological periods of earth. They are: 1) azoic, 2) archaezoic, 3) proterozoic and 4) phanarezoic. Life began to start in archaezoic eon. These eons are divided in many eras and eras into many peroids.

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