I have lungs to help me breathe in air.

I have fur to keep warm.

I have teeth to eat food.

I have claws to help me dig for food and protect myself.

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I have scratching feet to dig for food.

I have wings to fly to get food and protect myself.

I have feathers to keep me warm.

I have a beak to eat bugs or seeds.

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Some animals, such as birds, have beaks, while other animals, like horses, have large mouths with flat teeth.
The difference in these structures is most closely related to -- 

• the sounds the animals make.
• the habitat the animals live in.
• the type of offspring they have.
• the types of food these animals eat.

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The spotted fur of a leopard and spotted skin of a leopard gecko are shown in the photographs below. 
How do these body coverings help organisms in their environments?

• They help organisms find food.
• They help organisms look like another animal in its environment.
• They help organisms eat food quickly.
• They help organisms blend into their surroundings. 

A body part on the outside of an animal that helps it survive is called a(n) _____

• internal structure

• external structure

• organism

• adaptation

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Something inside an animal that helps it survive is called a(n) _______

• organism

• shelter

• external structure

• internal structure

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A structure is...

• an arrangement of parts

• what something does

How does a rabbit use its white fur to survive in a snowy environment?

• allows it to find plants to eat

• camouflage to protect it from predators

• makes it look pretty in the snow

• allows it to help make food

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What structure protects a turtle from its predators?

• tail

• long neck

• hard shell

• short legs

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A polar bear lives in cold, snowy environments. What characteristics of the polar bear help keep it warm?

• sharp teeth

• large paws

• thick fur

• white color