Life originated in

Precambrian era

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Proterozoic era

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Mesozoic era

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Cenozoic era

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Solution

The correct option is A Precambrian era
Precambrian is one of the four eras in earths geological history. Precambrian actually meant period before cambrian period of Palaeozoic era. Precambrian is divided into three periods- Azoic (no life), Archaeozoic (invisible life) and Proterozoic (age of early life). It is believed that life appeared in Archeozoic period of precambrian era.

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