Natural Selection CYK

What is a change in traits within organisms that occurs over many generations?

• Natural Selection

• Evolution

• Genetic Drift

• Adaptation

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NGSS.MS-LS4-4

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Why were there more light colored moths before the industrial revolution?

• The light colored moths had traits making them more likely to survive and reproduce.

• The dark colored moths blended in easier, so they were eaten more often by the birds.

• The light colored moths camouflaged better, so the birds ate them most often.

• The dark colored moths were easier to see, so the light colored moths did not move very often.

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Which of the following is required for Natural Selection to occur?

• Variation

• Survival of the Fittest

• Reproduction

• Environmental Pressure

• All of the above.

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NGSS.MS-LS4-4

What must be present within a population for natural selection to happen?

• Variation

• Food

• Small numbers

• Identical offspring

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NGSS.MS-LS4-4

Which of the following best describes the phrase "survival of the fittest?"

• The organisms that are fastest are able to hunt more effectively, making them the best at surviving.

• The organisms that are strongest are able to overpower other organisms within that population, thus making them more fit.

• The organisms with the favorable variations for that particular environment will survive and reproduce, passing down their favorable traits.

• The organisms that are able to hide better will be more likely to get food, making them healthier than others within the same population.

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NGSS.MS-LS4-4

Which of the following traits would make an organism more fit?

• The ability to move very quickly.

• The ability to sneak up on prey quietly.

• The ability to hide easily.

• Depends on the environment they are in.

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Which of these scenarios describes natural selection?

• Grizzly bears with adaptations will have more offspring than other bears. Over time, these adaptations will become more common in the grizzly bear population.

• A grizzly bear learns to adapt to the environment. Over time, most of the grizzly bears in the population will also learn how to adapt to their environment in this way.

• The environment populated by grizzly bears is very cold in the winter. For this reason, grizzly bears choose to grow thicker, warmer coats of fur.

• The environment has caused grizzly bears to grow warm coats of fur. This allows them to stay warm in the winter and survive in this harsh environment longer than other bears.

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NGSS.MS-LS4-4

How might bacteria evolve through natural selection by misusing antibiotics?

• If antibiotics are not used for the full time they are prescribed, the bacteria with greater fitness will die off too quickly. This will prevent your body's immune system from learning how to fight off this bacteria.

• If you take antibiotics for too long, the bacteria may evolve by learning how to fight off the antibiotic.

• Some bacteria may have mutations making them resistant to the antibiotic. If the antibiotic is not used long enough the resistant bacteria will reproduce.

• If you use mutiple forms of antibiotics for one type of bacteria, the bacteria will evolve to only survive one type of antibiotic.

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