Which of the following statements about the nitrogen cycle are false? 1. Rhizobium and Frankia cause nitrogen fixation in their independent free-living stage. 2. Azotobacter and Anabaena are anaerobic, symbiotic as well as free-living, nitrogen fixers. 3. Rhodospirillum is an aerobic, nitrogen-fixing microbe found in the root nodules of legumes. 4. Nitrobacter oxidises nitrites to nitrates.

Question

Which of the following statements about the nitrogen cycle are false? 1. Rhizobium and Frankia cause nitrogen fixation in their independent free-living stage. 2. Azotobacter and Anabaena are anaerobic, symbiotic as well as free-living, nitrogen fixers. 3. Rhodospirillum is an aerobic, nitrogen-fixing microbe found in the root nodules of legumes. 4. Nitrobacter oxidises nitrites to nitrates. (A) 1 and 2 (B) 2 and 4 (C) 1,2 and 3 (D) 3 and 4

Tardigrade Admin · Accepted Answer

Correct answer is (c) 1,2 and 3