Biology 5090 · O Level · Nutrient cycles

Nutrient cycles — practice question

Soil with a higher water content provides favourable conditions for denitrifying bacteria to multiply. Which effects will be observed on the growth of plants in this soil?

  • AMore nitrate ions are taken up by plants, so plants grow less well.
  • BMore nitrogen fixation takes place, so plants grow taller.
  • CDenitrification results in nitrogen gas being taken up by plants and they grow taller.
  • DThere are fewer nitrate ions in the soil, so plants grow less well.

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