Question

Which of the following best describes the nitrogen cycle?

Cycling of nitrogen and oxygen that contributes 78% of atmospheric gases and drives food webs
Cycling of nitrogen and oxygen that involves changes between the solid, liquid, and gas phases
Cycling of nitrogen that contributes 78% of atmospheric gases and drives food webs
Cycling of nitrogen that involves changes between the solid, liquid, and gas phases

Answer 1

Nitrogen is converted into various chemical forms by the nitrogen cycle. During this cycle it circulate among the atmosphere, terrestrial and marine ecosystems. The stags of the cycle are: ammonification, nitrification, nitrogen uptake by plants, fixation of nitrogen, denitrification.
Answer : D ) Cycling of nitrogen that involves changes between the solid, liquid and gas phases.