Class Mammalia

How many years ago did mammals appear?

• 70 million years

• 125 million years

• 200 million years

• 10 million years

Where are mammals distributed?

• land and air

• land and water

• land, air and water

• the land

Through which organ is the embryo nourished?

• placenta

• silk beans

• diaphragm

• stomach

Which animal is NOT a mammal?

• rat

• bear

• blue whale

• turtle

Marsupial mammals are divided into:

• 4 families

• 24 families

• 16 families

• 8 families