Changes Over Time

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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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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Mutations, gene flow and choosing a "fit" mate can all 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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When every organism of a species has died.

• Evolution
• Natural Selection
• Extinction
• Artificial Selection

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Where the better adapted organisms survive to pass traits along to offspring.

• Evolution
• Natural Selection
• Extinction
• Artifical Selection

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What is the advantage of having different shaped beaks?

• To look different from other species.
• To be able to eat the food readily available in the environment.
• To protect itself against predators.
• To protect itself against prey.

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Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.
• Because they come from dominant alleles.
• Because they come from recessive alleles.
• Because the trait is an acquired phenotype.

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NGSS.MS-LS4-4

Mutations are a change in what?

• DNA
• tRNA
• genotype
• phenotype

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