Biology 5090 · O Level · Nutrient cycles

Nutrient cycles — practice question

The diagram illustrates part of the nitrogen cycle. Which processes are P, Q, R and S?

  • AP nitrification, Q nitrification, R decomposition, S nitrogen fixation
  • BP nitrification, Q nitrogen fixation, R nitrification, S decomposition
  • CP nitrogen fixation, Q nitrification, R decomposition, S nitrogen fixation
  • DP nitrogen fixation, Q nitrogen fixation, R nitrification, S decomposition

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