Structures and Functions

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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All of the following adaptations help plants, like the cactus, survive in the hot, dry conditions of a desert EXCEPT –

• growing tall over many years
• a thick, waxy outer covering
• the ability to store water
• spines to protect from animals

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Which of the following statements correctly describes the structure that helps this animal survive in its environment?

• thick layer of blubber

• big furry ears

• a transparent eyelid

• the ability to change colors with the seasons

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Which of the following statements is correct?

• A giraffe has long legs to reach watering holes easily.

• A giraffe has a long tail to help guide him when he runs.

• A giraffe has a long tongue to reach the leaves of tall trees.

• A giraffe has a long mane down its neck to help it run faster.

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Which of these structures helps a shark find its prey?

• tough skin

• an extremely strong sense of smell

• fins

• three rows of sharp teeth

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Why might some plants have thorns?

• to stay safe from animals that want to eat the plant
• to attract insects that spread pollen to other plants
• to take in nutrients from the air
• to provide shade for the plant

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Which of the following describes an adaptation of a lizard that helps it survive in its environment?

• A lizard has two sets of lips to help it retain water.
• A lizard has extra big feet to spread out the heat from the ground.
• A lizard has gills to breathe underwater when it floods.
• A lizard has a tail that breaks off so it can run away when grabbed by a predator.

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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. 

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What is one possible reason for seeds to have hooks or barbs?

• to stay warm during the winter
• to protect themselves from sunlight
• to get attached to passing animals and get carried away
• to be easier for animals to eat them

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Which structural adaptation allows the penguin to stay warm when diving in icy water?

• The beak

• The feathers

• The flippers

• The webbed feet

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