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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.. .

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Kalahira
Bacteria can be nitrogen-fixers, decomposers or agents/ catalysts. However, in the case, when the complex organic compounds in sewage are broken down by bacteria, the role of bacteria here is "as decomposers. Bacteria on this case decompose highly complex organic compounds.

Answer:

B. Bacteria act as decomposers.

Explanation:

  • The bacteria are unicellular organisms that are found in diverse habitats and can play many roles.
  • The process of breaking down of complex compounds into simpler compounds is referred to as decomposition.
  • The bacteria are the organisms that play a role in the decomposition of the organic material present in the sewage.
  • Example of a bacteria that perform decomposition is Bacillus subtilis.
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