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Identify the balck precipitate

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Two peptone iron deeps were inoculated with bacteria X and bacteria Y respectively. After 24 hours, both test tubes show growth and the tube with bacteria X shows a black precipitate in the bottom of the tube. The tube with bacteria Y shows no change in color. Identify the balck precipitate and explain how it forms (where did it come from)? (be specific and explain the reaction)

Reference no: EM132322276

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