$Azotobacter$ and $Clostridium$ are nitrogen-fixing bacteria and are found in:

  • A
    Nodulated roots
  • B
    Leaves of certain plants
  • C
    Free in soil
  • D
    None of the above

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The enzyme nitrogenase is protected from the inhibitory effects of oxygen in root nodules by .............

The function of leghemoglobin present in the root nodules of leguminous plants is to ........

What will happen if $Rhizobium$ bacteria are introduced into a wheat field?

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