Animal Structures and Functions

All reptiles reproduce by laying eggs.

• True
• False

_____ is the main bone, made up of many small bones joined together, that runs up the middle of the back in some animals.

• exoskeleton
• stimulus
• backbone
• reflex

The hard outer covering that supports and protects some animals without backbones.

• exoskeleton
• backbone
• molt
• gill

What is something all animals can do?

• produce young
• hunt for food
• move about on land
• protect their territory

How are a dolphin and a horse alike?

• Their skin is dry and scaly.
• They feed milk to their young.
• They have a thick coat of hair.
• They are cold blooded.

Wild baby animals are similar to their parents in the way they

• hunt.
• look.
• learn.
• play.

What is one way that a bird differs from a reptile?

• A bird lays eggs, and a reptile does not.
• A bird has dry, scaly skin, and a reptile doesn't.
• A bird has a backbone and a reptile doesn't.
• A bird is warm-blooded, and a reptile isn't.

The bodies of most mammals are covered with 

• hair
• milk
• scales
• down

Where do amphibians begin their lives?

• in water
• on land
• on a beach near the water
• on land or in the water depending on the kind of amphibian

How are all insects alike?

• They have two pairs of wings.
• They have four pairs of legs
• They have three body parts
• They can fly.