Natural Selection Review

Which statement(s) are true about mutations, Mutations....

• are not necessary for adaptation to occur

• can lead to a new predominant trait in a population

• only happen when the environment changes

• are very common

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What needs to be true for adaptation to occur?

• A trait exists in a population

• Organism's ability to survive and reproduce are increased

• Trait is heritable

• The trait needs to be predominant in a population

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The deliberate manipulation of environmental pressures to change the traits in a species is called....

• natural selection

• artificial selection

• survival of the fittest

• genes

The trees these moths used to live on were white, but have been covered in soot from coal factories. Which moth will be more successful in this environment?

• Dark moth
• Light moth
• Both will be equally successful
• Neither will be successful

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What process is being shown in this image?

• Variation
• Natural Selection
• Selective Breeding
• Homeostasis

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Which best describes the role of mutations in natural selection?

• Mutations help an organism to better survive in their environment

• An organism may acquire a helpful mutation by interacting with the environment

• A mutation may result in a beneficial trait that makes an organism more likely to survive and reproduce

• Organisms with certain traits are more likely to win competitions for mutations

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The change in traits over time in a population is known as

• Evolution

• Mutation

• Selection

• Traits

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If a new trait DOES NOT help an organism survive, what may happen to it?

• Not survive or reproduce

• Survive & reproduce

• Survive

• Die

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Why is the mouse population changing over time?

• The light mice can reproduce more successfully than the dark mice
• The hawks eat more dark mice than light mice because the dark mice taste better
• The hawks eat more light mice than dark mice because they can see the light mice more easily
• The hawks eat more dark mice than light mice because they can see the dark mice more easily

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Adaptations can be:

• camouflage

• ability to survive cold weather

• hunting skills

• all of the above

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