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IB Biology C1.3.7 Limiting factors investigation

IB Biology C1.3.7 Limiting factors investigation
IB Biology syllabusBiology SL/HLFirst assessment 2025

Practise interpreting photosynthesis experiments where light intensity, CO2 concentration and temperature limit rate, using graphs and controls.

How this is tested

  • interpret rate graphs to decide whether light, CO2 or temperature is limiting
  • explain plateaus and curve changes as one factor stops raising photosynthesis rate
  • apply fair-test controls when investigating light intensity or other limiting factors
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