Multiple choice

In which of the following eras, there was no life on earth?

  1. Proterzoic

  2. Azoic

  3. Mesozoic

  4. Archeozoic
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B Correct answer
Explanation

The Azoic era (also called Hadean) literally means 'without life' from Greek 'a' (without) + 'zoic' (life). It represents Earth's earliest geological period when conditions were too hostile (extreme heat, no atmosphere) for any life forms to exist. The other eras (Proterozoic, Mesozoic, Archeozoic) all had abundant life.

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