Nitrification is characterized by all of the following except:
A) carried out by autotrophic bacteria
B) supplies plants with a usable nitrogen source
C) produces ammonia
D) nitrogen is oxidized in both of the two steps
Correct Answer:
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Q3: Producers obtain CO₂ from _.
A)eating other producers
B)the
Q5: The most usable form of sulfur by
Q7: Denitrification is:
A)a process by which nitrates are
Q8: In the sulfur cycle many microbes convert
Q9: Sulfate-reducing bacteria are characteristically _.
A)strict anaerobes
B)Desulfovibrio
C)utilizing sulfate
Q12: The loss of water from pores of
Q13: The mechanism whereby Rhizobium and the legume
Q15: Nitrogen-fixing bacteria include:
A)cyanobacteria
B)Clostridium
C)Klebsiella
D)all of these choices
Q17: Which is a primary symbiotic nitrogen fixer
A)Azotobacter
B)Rhizobium
C)Cyanobacteria
D)Clostridium
Q25: In the phosphorous cycle,inorganic phosphates are converted
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