ORIGIN AND EVOLUTION OF LIFE

CHOOSE THE CORRECT OPTION.

When did the origin of the life begin?

• it began in Paleozolic era.

• It began in Pre-Cambrian era.

• It began in Permian.

• It began when anfibians appeared.

2. How was the air in Pre-Cambrian.

• the air was very toxic

• the air is very toxic

• the air will be toxic

• the air has been very toxic

When did the planet began to change?

• Pre-cambrian

• Silurian

• Paleozolic

• Carboniferous

The first reptiles and insects with wings appeared on land

• Paleozolic

• Ordivician

• Devonian

• Carboniferous

There was a mass extinction.

• Devonian

• Permian

• Cambrian

• Silurian