A botanist decides that he wants to test the effects of ultraviolet light on the growth of plants. Which of the following does NOT need to be kept constant for each of the plants used in this experiment? A. Soil pH B. Air Temperature C. Air Humidity D. Plant growth
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Just trying to raise my grade and need with these
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A botanist decides that he wants to test the effects of ultraviolet light on the growth of plants. W...
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