Mammals and Birds

Mammals are _______.

• vertebrates

• invertebrates

Mammals are _______.

• cold-blooded animals

• warm-blooded animals

Mammals have fur or hair on their bodies.

• True

• False

Mammals breathe with their lungs.

• True

• False

Birds lay eggs, have beaks and have 

• fur
• wings and feathers
• milk

Mammals have hair and fur and
feed babies _____

• eggs
• worms
• milk

Mammals are animals that

• Don't have a backbone
• Have live young
• Lay eggs

Which of the following is a characteristic that all mammals share?

• they all have a pouch
• they all have a cloaca
• they all have hair
• they all have a short gestational period

Is this a mammal?

• Yes
• No

Is this a mammal?

• Yes
• No