3597: Arrange the following fertilisers according to the decreasing order of their nitrogen content:
I. Ammonium sulphate
II. Ammonium nitrate
III. Potassium nitrate
IV. Urea
(a) IV, II, III, I
(b) IV, II, I, III
(c) IV, III, II, I
(d) II, IV, III, I
3600: Which bacterial strain, developed from natural isolates by genetic manipulations, can be used for treating oil spills ?
(a) Agrobacterium
(b) Pseudomonas
(c) Nitrosomonas
(d) Clostridium