Q2
Which of the following statements are correct regarding the microorganisms P, Q, R and S involved in the nitrogen cycle shown above?
(i) 'R' is Nitrosomonas bacterium that oxidises nitrites into nitrates.
(ii) 'P' is putrefying bacterium that converts nitrogen containing proteins of dead plants into ammonia.
(iii) 'S' is Pseudomonas bacterium that converts nitrate salts into free nitrogen gas.
(iv) 'Q' is Nitrobacter bacterium that converts nitrites into nitrates.
(v) 'S' is Azotobacter bacterium that fixes free nitrogen gas