Natural Selection

Evolution means

• no living thing changes.

• things changed until humans formed.

• change of population over generations.

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Horses with single, flattened hooves are helpful in what environment?

• Tropical forest with uneven surface.

• Open grassland with firm and flat surface.

• Rocky and uneven survace

• Sandy and rocky surface.

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Horseshoe crabs have not changed for many generations because

• the environment has changed too quickly.

• they are super heroes.

• the environment they live in changed very little.

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What evidence exists for Darwin's theory?

• Fossil record

• Comparisons of similar anatomy between species

• DNA Evidence

• All 3 of these types of evidence

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Theories have

• little evidence and are tentative.

• have lots of evidence and are widely agreed on by many scientists.

• many scientists randomly guessing.

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Inherited differences in a population are called

• selections.

• producers.

• variations.

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Natural selection leads to

• populations becoming better adapted over many generations.

• individuals changing to adapt to environment.

• almost nothing going extinct.

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A hypothesis is a

• well-test explanation supported by most scientists.

• wild guess.

• possible explanation; it does not yet have much evidence.

• statement that can never be tested.

Mutations can lead to

• new variations.

• nothing; they make no difference.

• extinction in all cases.

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An inherited trait that helps a living thing survive in a specific environment is called a(n)

• Adaptation

• Competition

• Species

• Gene Flow

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