Biology 0610 · IGCSE · Nutrient cycles

Nutrient cycles — practice question

The flow chart shows the process of eutrophication. What should appear at step X and step Y in the flow chart?

  • Astep X: decrease in nitrate ion concentration; step Y: decreased dissolved oxygen concentration
  • Bstep X: increase in nitrate ion concentration; step Y: decreased dissolved oxygen concentration
  • Cstep X: decrease in nitrate ion concentration; step Y: increased dissolved oxygen concentration
  • Dstep X: increase in nitrate ion concentration; step Y: increased dissolved oxygen concentration

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