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Biogeochemical cycle

biogeochemical cycle
biogeochemical cycle
The flow of chemical elements and compounds between living organisms and the physical environment. Chemicals absorbed or ingested by organisms are passed through the food chain and returned to the soil, air, and water by such mechanisms as respiration, excretion, and decomposition. As an element moves through this cycle, it often forms compounds with other elements as a result of metabolic processes in living tissues and of natural reactions in the atmosphere, hydrosphere, or lithosphere. See more at carbon cycle, nitrogen cycle.


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    the subject of a biography; the person whose life is described in a biography. noun a person whose biography has been written

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    a writer of someone’s biography. Contemporary Examples The Perils of Biography in the Bradlee-Himmelman Storm Lee Siegel May 19, 2012 Blake Bailey: How I Write Noah Charney March 19, 2013 Three Great Men Died That Day: JFK, C.S. Lewis, and Aldous Huxley John Garth November 2, 2013 60-Second Guide to the Nobel Lit Winner Lucas […]

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    of or relating to a person’s life: He’s gathering biographical data for his book on Milton. pertaining to or containing biography: a biographical dictionary. Historical Examples Sartor Resartus Thomas Carlyle Life of John Keats William Michael Rossetti Juggernaut George Cary Eggleston Marriage and Love Emma Goldman Shakespeare and the Modern Stage Sir Sidney Lee In […]

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    a written account of another person’s life: the biography of Byron by Marchand. an account in biographical form of an organization, society, theater, animal, etc. such writings collectively. the writing of biography as an occupation or field of endeavor. Contemporary Examples Wes Clark on Washington General Wesley K. Clark October 13, 2010 From Union to […]

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