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Sulfur scrubbers are devices installed in coal-fired power plants. Sulfur scrubbers reduce the emission of sulfur dioxide. What environmental problem are sulfur scrubbers most likely trying to address?

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A scientist is comparing two body cells of a multicellular organism. Which of the following is most likely identical?

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Which event becomes more likely during a drought in a prairie ecosystem?

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Which sense can be used to determine an object's ability to reflect light?