Darwin's Natural Selection and Adaptations

The economist Thomas Malthus suggested that

• in the human population, people die faster than babies are born.

• without certain checks on population size, there would soon be disease, war or famine.

• in the 1700s, England needed more housing.

• the majority of a species’ offspring die.

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Charles Darwin called the ability of an organism to survive and reproduce in its specific environment 

• diversity.
• evolution
• adaptation. 
•  fitness.

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The principle of common descent helps explain why

• well-adapted species have many offspring.
• conditions in an organism’s environment ensures the organism’s survival.
• birds and reptiles share a number of inherited characteristics.
• tigers are so different from cheetahs.

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Charles Darwin’s theory of evolution by natural selection explains each of the following EXCEPT how 

• species can become extinct.
• inherited traits are passed from parent to offspring
• species descend from common ancestors. 
• evolution takes place in the natural world.

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An example of a behavioral adaptation is

• The long neck of a giraffe
• Penguins huddling together for warmth
• A camel's hump used to store water
• A polar bear's white fur used for camouflage

An example of a structural adaptation is...

• a turtle hiding inside its shell

• The spikes on a porcupine fish

• a rabbit burrowing underground

• a viper biting when threatened

A black bear hibernates during the winter months is an example of a:

• Behavioral Adaptation

• Structural Adaptation

• Physiological Adaptation

A dorsal spine on the spiny dogfish is an example of

• Behavioral and Structural adaptations

• Structural and Physiological adaptations

• Physiological and Behavioral adaptations

• Structural adaptation

The rock pocket mouse blends in with its environment. This is an example of...

• camouflage

• warning coloration

• mimicry

• hibernation

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A pine snake moves it tail quickly in pine needles so it sounds like a rattle snake. This is an example of which type of behavior?

• camouflage

• mimicry

• physiological adaptation

• structural adaptation