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Which of the following provide chemical evidence of ice ages? a. variations in ph levels in fossils b. concentrations of compounds in rock c. variations in ratios of isotopes in fossils d. concentrations of compounds in old trees
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Which gas found in the earth's atmosphere greatly impacts the daily range of temperature on earth. a) oxygen b) hydrogen c) nitrogen d) water vapor
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Which macromolecule catalyzes chemical reactions this be considered enzyme chemical reactions thus he considering enzymes
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Which of the following provide chemical evidence of ice ages? a. variations in ph levels in fossils...
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