Natural Selection and Traits

The primary difference natural and artificial selection is

• In nature selection the “pressure” comes from the environment; In artificial selection the “pressure” comes from humans (or another species).

• In artificial selection the “pressure” comes from the environment; In natural selection the “pressure” comes from humans (or another species).

• Natural selections is when humans breed the animal; Artificial selection is when humans direct genes directly.

• They are different terms for the same concept.

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The purpose of selective breeding is to 

• Get bigger animals

• get smaller animals

• create animals with desirable traits

• create animals with bad traits

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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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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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Due to pollution, a pond becomes darker over time. Which trait variation became more common?

• light fish

• dark fish

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A species could go extinct if:

• food becomes more plentiful.

• members of the species have adaptations to enhance survival.

• the environment changes drastically and no one can adapt.

• there is less competition for resources.

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What type of environment do you think this data was collected from?

• forest with primarily white-bark trees

• forest with primarily dark-bark trees

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A yellow morph and green morph of an insect lives in the rainforest canopy. You would expect:

• the green population to increase and the yellow to decrease

• both populations should stay the same

• both populations will increase

• the green population to decrease and the yellow to increaseThis is a wrong answer

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TRUE or FALSE: Natural selection will still occur if each individual has the same exact traits

• TRUE

• FALSE

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How do you "win" at natural selection?

• survive

• go extinct

• survive & reproduce

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