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What component of earth’s atmosphere exists entirely as a result of photosynthesis?
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Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up
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Before organisms with nuclei evolved, life on earth consisted only of unicellular a) eukaryotes. b)...
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