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Cycles within ecosystems

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Question 13

The diagram shows part of the nitrogen cycle.

The nitrogen cycle diagram showing the processes X, Y, and Z.

a.

Name the biological processes XXX, YYY and ZZZ shown in the diagram.

[3]
b.

Explain the possible consequences of waterlogged (anaerobic) soil conditions on process ZZZ and the level of nitrates in the soil.

[2]
c.

Describe how the leaching of excess nitrates from agricultural land into freshwater lakes contributes to eutrophication.

[4]

Cycles within ecosystems Questions

  1. IGCSE
  2. /Biology
  3. /Cycles within ecosystems