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How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?
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Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules
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The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above
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What is the difference between a cyclone and an anticyclone? *...
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