Unit 5 Lesson 1 and 3 Content Test

Organisms live, or perform basic functions to stay alive. They also survive, or compete for resources, protect themselves, and find food. In which of the following does an octopus use a structure of its body mainly for survival?

• eating

• breathing

• squirting ink

• swimming sideways

Different species of animals have body structures that help them survive. Compare the animals pictured below. Which has a body structure that will best protect it from an attack by a predator?

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A human and an oak tree both have structures that function to help them live. Skin is one of those structures for humans. A human’s skin is most like which part of an oak tree?

• acorn

• bark

• leaf

• root

Which is an example of a living thing’s environment affecting its physical characteristics?

• a puppy born with brown fur

• a flower in the shade not growing very tall

• a bird’s ability to fly

• a baby crying when hungry

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Which of the following best describes the actions of many kinds of birds when the weather gets cold?

• They migrate to a cooler climate.

• They hibernate in their nests.

• They grow more feathers for the summer.

• They migrate to a warmer climate.

Which behavioral adaptation helps penguins survive in cold Antarctic weather?

• streamlined body

• huddling closely together

• hibernating

• dark black skin

Which of the following would be the most useful in a polar region?

• horns

• an extra layer of fat

• good eyesight

• good hearing

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Many desert animals are nocturnal. How does this adaptation help them survive in their environment?

• It helps them hunt during the heat of the day.

• It helps them lose excess water.

• It causes them to sleep at night when temperatures are cooler.

• It causes them to sleep during the heat of the day and hunt at night

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Salmon have strong muscles in their tails for swimming in fast-moving water. Where would you expect to find salmon?

• the deep ocean

• a wetland

• a river

• a small pond

A lizard has the same color as the leaf on a tree. Predators cannot see this lizard very easily. This is an example of

• hibernation

• migration

• mimicry

• camouflage

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