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Eutrophication and dead zones. Biogeochemical cycles (definition) the cycles that move water, carbon, oxygen, and nitrogen through living and nonliving parts of the ecosystem. There nitrogenases are very suseptible to destruction by oxygen. a)oxygen cycle. D precipitation. (i) Which one of the following is included in biosphere? Biogeochemical Cycles Chapter Exam Instructions. Condensation. The water cycle is driven by the: A sun. assessment questions for biogeochemical cycles answer key is available in our book collection an online access to it is set as public so you can get it instantly. d) none of the above. TEST REVIEW. The process of biofixation of nitrogen is called as nitrogen fixation. C. Biological systems use … Learn. Multiple Choice ____ 1. What is a naturally occurring, solid mass of mineral or mineral-like matter? Match. 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