Biology 0610 · IGCSE · Nutrient cycles

Nutrient cycles — practice question

Which row indicates part of the nitrogen cycle?

  • Adecomposition; ammonium ions; protein
  • Bdenitrification; nitrate ions; ammonium ions
  • Cnitrogen fixation; nitrate ions; nitrogen gas
  • Dnitrification; ammonium ions; nitrate ions

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