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Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence
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When does the circulatory system work with the respiratory system? a. during blood cell formation b. during cellular respiration c. during intestinal digestion d. during a viral infection
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Reactants undergo chemical reaction to form products. this chemical equation represents one such reaction. the coefficient for one of the reactants or products is incorrect. which part of the chemical equation is incorrect?
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The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million
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Differences in air pressure drive the global wind systems on earth. which term describes polar winds...
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