Natural Selection

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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NGSS.MS-LS4-2

NGSS.MS-LS4-4

Adaptations can be:

• camouflage

• ability to survive cold weather

• hunting skills

• all of the above

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NGSS.MS-LS4-4

Differences in traits are called:

• natural selection

• genetic variations

• artificial selection

• adaptations

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NGSS.MS-LS4-4

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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NGSS.MS-LS2-4

NGSS.MS-LS2-5

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Natural selection occurs during the lifetime of a single organism.

• True

• False

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 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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NGSS.MS-LS2-4

NGSS.MS-LS4-4

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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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

How do you "win" at natural selection?

• survive

• go extinct

• survive & reproduce

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NGSS.MS-LS1-4

NGSS.MS-LS4-2

NGSS.MS-LS4-4

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

• light fish

• dark fish

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

NGSS.MS-LS4-4