Which of the following is an example of a free-living and anaerobic $N_2$-fixing bacterium?

  • A
    Azotobacter
  • B
    Rhodospirillum
  • C
    Anabaena
  • D
    Nostoc

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Similar Questions

Provide definitions/explanations for the following terms:
$(1)$ Biological Nitrogen Fixation
$(2)$ Root Nodules

Which of the following does not help in ${N_2}$ fixation?

Which of the following are free-living nitrogen-fixing microbes?

The $nif$ gene is associated with which of the following?

Which element is required for the activation of nitrogenase enzymes?

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