Worldwide circulation and reutilization of carbon atoms, chiefly due to metabolic processes of living organisms. Inorganic carbon, in the form of carbon dioxide, is incorporated into organic compounds by photosynthetic organisms; when the organic compounds are broken down in respiration, carbon dioxide is released. Large quantities of carbon are "stored" in the seas and the atmosphere, as well as in fossil fuel deposits.
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You would multiply by two i believe
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I used to have to do those and thats what i was taught. Have A Nice Day :)
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Chemicals that are secreted from antigen-presenting cells then activate helper T cells.
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