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Astudy was performed on 20 trees to test the effectiveness of a new fertilizer. the results of this specific study is brought into question. what would possibly improve the reliability of the results?
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Astudent observes a star from two positions of earth in its orbit, in summer and winter, and measures the change in the position of the star. which of these can be best calculated by this method?
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What substance acts to prevent sudden ph changes in bodily fluids?
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What do the numbers after the arrows represent?...
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