Which One of the Following Statements Is TRUE Regarding the Nitrogen

question 36

Multiple Choice

Which one of the following statements is TRUE regarding the nitrogen cycle?

• A) Nitrogen fixation results in the production of nitrogen from carbon.
• B) Atmospheric nitrogen is unavailable to living organisms because two nitrogen atoms are held tightly together by a triple covalent bond.
• C) Plants take up ammonia directly from the atmosphere.
• D) Once nitrogen is "fixed," it must then be converted to nitrogen gas before living organisms can use it.
• E) In a balanced ecosystem, nitrogen fixation occurs more often than denitrification.

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