Competition and Natural Selection

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

• Evolution

• Natural Selection

• Extinction

• Artifical Selection

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NGSS.MS-LS4-4

If a new trait DOES help an organism survive, what may happen to it?

• It dies and its DNA is not passed on

• It survives and its DNA is passed on

• It changes its traits to adapt and survive

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

• It dies and its DNA is not passed on

• It survives and its DNA is passed on

• It changes its traits to adapt and survive

Tags

NGSS.MS-LS4-4

Organisms that are better adapted to the environment survive to pass traits to their offspring

• Natural Selection

• Homeostasis

• Selective Breeding

• Extinction

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NGSS.MS-LS4-4

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 an adaptive 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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NGSS.MS-LS4-4

Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

• Variation

• Adaptation

• Behavior

• Environment

Organisms with the most beneficial traits will survive.  This is commonly known as

• theory of evolution.

• variations.

• survival of the fittest.

• ecosystems.

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NGSS.MS-LS4-4

The graphs below show the changes in crab color at one beach. Which of the following is most likely to have caused the change in the distribution?

• A new predator arrived that preferred dark-tan crabs.

• A new predator arrived that preferred light-tan crabs.

• A change in beach color made medium-tan crabs the least visible to predators.

• A change in beach color made medium-tan crabs the most visible to predators.

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What is most likely to happen to moth populations in the picture shown?

• Light moths--hunted easily, dark moths--population increase

• Dark moths--hunted easily, dark moths--population increase

• Light moths--hunted easily, light moths--population increase

• Lights moths will change their color to match dark moths.

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NGSS.MS-LS2-4

NGSS.MS-LS4-4

What is natural selection?

• process in which helpful traits become more common over time

• a trait that helps an organism survive better

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