Without Microbes (Primarily Bacteria), What Would Most Likely Happen to the World's

question 154

Multiple Choice

Without microbes (primarily bacteria) , what would most likely happen to the world's natural nitrogen cycle?

• A) Cycling would stop; most nitrogen would remain in the atmosphere as N₂ gas.
• B) The cycle would continue unchanged; chemical reactions would take over bacterial actions.
• C) Nitrogen cycling in the oceans, which does not involve bacteria, would become dominant.
• D) The cycle would continue unchanged; bacterial activity is not needed now that humans can fix nitrogen.
• E) Nitrogen fixation would not occur, but nitrification and denitrification would remain unchanged.

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