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Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.
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Knowing the importance of the essential elements, why would someone chose a diet that does not address all of them?
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Look at the photo of the leaf, which term best describes this leaf ? a-simple.b-parallel.c-lobed.d-tooth.
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Identify this symbol.
h₂o
anion
cation
atom
molecule...
h₂o
anion
cation
atom
molecule...
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