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Biology · May / June 2019 · Paper 12 · Question 30

5090Nutrient cycles

The diagram shows part of the carbon cycle. [diagram: CO2 in the atmosphere, fuel, green plants, dead organisms, animals, feeding, respiration, X, Y] What are the processes X and Y?

  1. AX photosynthesis; Y decomposition
  2. BX photosynthesis; Y excretion
  3. CX respiration; Y photosynthesis
  4. DX respiration; Y respiration

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Correct answer: D. X respiration; Y respiration

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