Which of the following organisms cannot fix nitrogen?
A. Azotobacter
B. Oscillatoria
C. Anabaena
D. Volvox
E. Nostoc
Choose the correct answer from the options given below:
1. B only
2. E only
3. A only
4. D only
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Subtopic: Â Kingdom Monera: Blue Green Algae |
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NEET - 2025
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