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How did biochemical pathways evolve?
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To stress the biological, geological and chemical nature of the processes, they are sometimes called biogeochemical cycles. There are macronutrients as C, H and O which have cycles with an atmospheric store, and some as P and K obtained from the soils. There are micronutrients as Cu, Fe, Co which have soil-based, or edaphic cycles. Nitrogen, a macronutrient, has inorganic pools in both the atmosphere and soil.
A variety of biogeochemical processes controls the links between available and unavailable forms of edaphic nutrients. The qualitative and quantitive nature of nutrient cycles in natural ecosystem is very diverse.
Posted by orchid101 on April 26, 2013 at 1:41 PM (Answer #1)
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