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chubi1993 chubi1993
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6 years ago
Nitrogen fixation and nitrification are directly important processes for:
 
  a. heterotrophic animals.
  b. heterotrophic bacteria.
  c. autotrophic organisms.
  d. fungi.
  e. viruses.
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6 years ago
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chubi1993 Author
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6 years ago
I appreciate this
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