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NEET2025ZoologyMicrobes in Human WelfareActual

Which of following organisms cannot fix nitrogen? A. Azotobacter B. Oscillatoria C. Anabaena D. Volvox E. Nostoc Choose the correct answer from the options given below:

Options

  1. AA only
  2. BD only
  3. CB only
  4. DE only

Correct answer

B. D only

Step-by-step solution

Azotobacter, Oscillatoria, Anabaena and Nostoc can fix nitrogen but Volvox cannot fix nitrogen.

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