Question

During which period did the origin of life occur?

Options

• Archaeozoic era

• Cambrian period

• Ordovician period

• Proterozoic era

Answer 1

The Archaeozoic era, spanning 3800 million years ago, is the 'Era of Dawn Life' and marks the origin of life. Simple unicellular organisms first appeared during this era, with no recognizable fossils preserved from this time period.