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Plz answer........
Asked by | 15 May, 2009, 07:36: PM
answered-by-expert Expert Answer

It is a pathway or circuit by which an element or molecule moves through both biotic and abiotic compartments of Earth. Elements, chemical compounds, and other forms of matter are passed from one organism to another and from one part of the biosphere to another through the biogeochemical cycles.

Answered by | 15 May, 2009, 08:08: PM

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