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Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .
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In the water cycle , when does water undergo a chemical change
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What is usually (but not always) related to the metabolic processes of living organisms in its organic form?
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Explain how flooding affects rivers and how flooding can be influenced by human activity...
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