The process of nitrogen fixation involves the transformation of ______.
A) ammonia to organic matter nitrogen
B) nitrogen gas to ammonia
C) nitrate to nitrogen gas
D) ammonia to nitrate
Correct Answer:
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Q14: Inorganic phosphorus complexed with cations in the
Q15: The carbon cycle begins with _.
A)the conversion
Q16: Some microbes convert iron to magnetite which
Q17: Microbes sometimes make metals such as mercury
Q18: Which of the following does not contribute
Q20: Which of the following is not an
Q21: Sulfate and sulfite reductions carried out by
Q22: Forests are generally regarded as CO2 _.
A)sources
B)sinks
C)both
Q23: When nitrate is reduced to dinitrogen gas
Q24: Biomagnification involves compounds having higher relative concentrations
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