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Biology 9 Online
OpenStudy (anonymous):

Complex organic compounds in sewage are broken down by bacteria. What is the role of bacteria in this? A. Bacteria act as nitrogen fixers. B. Bacteria act as decomposers. C. Bacteria act as catalysts.

OpenStudy (beccaboo333):

Welcome to OpenStudy!! The answer is B, they decompose human excteta to simplest forms. It can be used as compost.

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