Biology 5090 · O Level · Nutrient cycles

Nutrient cycles — practice question

The diagram illustrates part of the carbon cycle. Which processes are X and Y?

  • AX: photosynthesis, Y: decomposition
  • BX: photosynthesis, Y: excretion
  • CX: respiration, Y: photosynthesis
  • DX: respiration, Y: respiration

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