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Assessment
What process do microbes primarily use to convert organic carbon into carbon dioxide?
Fermentation
Photosynthesis
Respiration
Assimilation
Which group of microorganisms plays a key role in decomposing organic matter?
Photosynthetic bacteria
Nitrogen-fixing bacteria
Fungi
Pathogenic bacteria
In the carbon cycle, which of the following roles do methanogens play?
Incorporating CO2 into organic matter
Producing methane from organic matter
Decomposing dead organic material
Fixing atmospheric carbon into biomass
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