Unit 2 Assessment Review

Farmers notice that after several years of using the same pesticide, more insects survive. What is the best explanation?

• Insects learn to avoid the pesticide

• Resistant insects survive and pass on their traits

• Pesticide stops working after a few years

• Insects gain immunity through exposure

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Which scenario is most likely to lead to the development of antibiotic resistance in bacteria?

• Using multiple antibiotics at once

• Short, incomplete courses of antibiotics

• Widespread misuse of antibiotics over time

• Sterilizing surgical tools

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Geographic isolation can lead to the formation of new species because:

• Organisms stop reproducing entirely

• Populations evolve separately under different conditions

• Genetic variation disappears

• All organisms become identical

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A population of beetles becomes separated by a river. Over many generations they develop different colors. This is an example of:

• Artificial selection

• Natural selection with geographic isolation

• Migration

• Genetic drift only

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The rise of “superweeds” resistant to herbicides is an example of:

• Speciation

• Evolution through natural selection

• Convergent evolution

• Artificial selection

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If a pesticide kills 95% of a pest population, the survivors:

• Are less likely to reproduce

• Have traits making them more likely to survive and reproduce

• Will lose their resistance over time

• Cannot pass resistance to offspring

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Which data would best support the claim that a population is undergoing natural selection due to a new predator?

• Change in predator diet

• Shift in prey coloration over generations

• Increase in predator population

• Random changes in climate

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A new antibiotic is released. After several years, most bacteria are no longer killed by it. This is because:

• The bacteria “get used to” the drug

• The antibiotic mutated

• Resistant bacteria reproduced more successfully

• The antibiotic evaporated

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Whales have small pelvic bones. This supports evolution by showing:

• Whales are fish

• Whales evolved recently

• Whales share ancestry with land mammals

• Pelvic bones are essential for swimming

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DNA comparisons between species are used to show:

• Differences in body structure

• Degrees of relatedness and common ancestry

• Mutations within one individual

• Food preferences

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