Question

I. All cyanobacteria are N₂

II. The main sources of biofertilizers are bacteria, fungi and cyanobacteria

III. Azospirillum and Azotobacter are symbiotic N₂-fixers

IV. Microbes like bacteria and many fungi can be grown on nutritive media to form colonies but they cannot be seen with the naked eyes.

• A. All are correct
• B. All are wrong
• C. Only I, III and IV are wrong
• D. Only II is wrong

Answer 1

Answer: (C)

Only I, III and IV are wrong