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A Soil Ecosystem Has Very Low Plant Growth and Is

Question 93

Multiple Choice

A soil ecosystem has very low plant growth and is found to be deficient in nitrogen.To obtain the nitrogen it needs using natural processes (as opposed to fertilizers added by humans) , this ecosystem would need more _______ bacteria.


A) nitrifying
B) denitrifying
C) nitrifying and denitrifying
D) nitrifying and nitrogen-fixing
E) nitrogen-fixing

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