Chapter 2

What do sea jellies, earthworms and spiders have in common?

• They all have eight legs.

• They all have stinging body parts.

• They are all animals with backbones.

• They are all animals without backbones.

A pelican's bill has a pouch that hangs from it. How does this adaptation help it survive?

• It helps the bird catch fish.

• It helps the bird store water.

• It helps the bird attack other animals.

• It helps the bird balance itself when it talks.

Complete the sentence

Body parts, such as webbed feet, are inherited, or

• learned.

• never changed.

• passed on from parents to offspring.

• not adapted to different environments.

Complete the sentence

An instinct is a behavior that animals

• copy.

• are born to do.

• teach each other.

• must learn so they can survive.

What do we usually call a butterfly when it is a larva?

• egg

• pupa

• chrysalis

• caterpillar

Which kind of animal usually develops inside its mother?

• bird

• insect

• mammal

• amphibian

Chris finds something that looks like a rock. It is hard and yellow. A dead insect is inside it. What did Chris most likely find?

• a trilobite

• a fossil cast

• a fossil mold

• a piece of amber

What modern-day animal looks like the dinosaur above?

• deer

• lizard

• spider

• elephant