Question

The oldest age when life existed on the Earth is

• A. Archaeozoic
• B. Azoic
• C. Cenozoic
• D. Proterozoic

Answer 1

The correct option is A

Archaeozoic

Correct option is (a).

The explanation of the correct option:

1. Archaeozoic is an era of unicellular in which unicellular development took place.
2. It is the second era of Earth’s evolution, the oldest era when life has existed.

The explanation of the incorrect option.

Option (b)-

1. Azoic is the first era of Earth’s evolution when life did not exist.

Option (c)-

1. Flowering plants, birds, and mammals are dominant during the Cenozoic era.
2. This is a current geological era.

Option (d)-

1. The proterozoic era is the era of the development of eukaryotes. It is the fourth era of Earth’s evolution.

Final Answer: The oldest age when life existed on the Earth is Archaeozoic.