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Why must an experiment or a survey be controlled? what is the difference between the control group and the experimental group in a controlled experiemnt?
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World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course. a. 12.5m/s b. 1.33m/s c. 13.3m/s d. 1.25m/s
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Along what geographical feature are most of the oil producing regions located
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Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance
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