Some elements that are essential to the biosphere are said to undergo biogeochemical cycling.
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Q24: Unlike materials, which cannot be recycled, energy
Q25: Most ecosystems have several interconnected food chains
Q26: Some elements are essential for life, others
Q27: Organisms are not selective in their uptake
Q28: A system that supports and sustains life
Q30: In general, residence times are short in
Q31: Different elements generally take the same pathways
Q32: The carbon, nitrogen, and phosphorus cycles are
Q33: The atmosphere has had a great influence
Q34: The rate of soil formation depends on
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