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Decomposition of remains from mineralization process is done by ______

(a) Other microorganisms

(b) Entering the food chain

(c) Increasing dissolved oxygen

(d) Producing methane gas

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This interesting question is from Problem Soil Management & Remediation in section Management and Remediation of Problem Soil of Environmental Biotechnology

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Right choice is (a) Other microorganisms

Easy explanation: Decomposition of remains from the mineralization process is done by  other microbes present the soil, they do it by utiliding the remaining contaminants as food source and and by entering the food chain of primary producers, increasing dissolved oxygen is the context related to biochemical oxygen demand of water and methane gas is produced as a result of activity of methanogens.

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