state gov TSPSC Group 2 (తెలంగాణ గ్రూప్ 2) Mock Test Series General Knowledge Geography (World Geography) Biogeography
Consider the following statements about the nitrogen cycle:
1. Nitrogen in the atmosphere cannot be directly used as a nutrient by any plants or animals.
2. Ammonia can be a direct source of nitrogen for some plants.
3. The nitrates present in the soil are reduced to nitrous oxide gas by the process of ammonification.
Which of the statements given above is/are correct?
1
1, 2 and 3
2
1 and 2 only
3
3 only
4
2 and 3 only