N2 content is kept constant in the biosphere due to
  • Nitrogen cycle
  • N2 fixation
  • Absorption of N2
  • Industrial pollution
HICH on droid HICH on iOS

Try to complete this Quiz and earn exclusive rewards.

Enjoy taking more than 100 Quizzes and Trivia by joining HICH.
Joint HICH today and earn your place among the experts!