When did animals appear on Earth?

In the ......................era most land animals and plants died.

• Paleozoic

• mesozoic

• cenozoic

In the ......................era the dinosaurs roamed the land , sea and the sky..

• Paleozoic

• mesozoic

• cenozoic

In the ......................era mammals appeared including today's mammals.

• Paleozoic

• mesozoic

• cenozoic

Early animals of....................era lived in the ocean .

• Paleozoic

• mesozoic

• cenozoic

More than 70 % of land animals and many plants became extinct in ....................era.

• Paleozoic

• mesozoic

• cenozoic

Early fish did not have jaws in ....................era.

• Paleozoic

• mesozoic

• cenozoic