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CAIE A-Level Biology 13.2.4 Whole-Plant Photosynthesis Investigations

Practise varying light, CO₂ or temperature in whole plants while measuring oxygen, carbon dioxide or pH change, controlling plant size and correcting net for respiration.

Syllabus
2028–2030
Course
Biology 9700
Level
A2

Exam points

  • select oxygen, carbon-dioxide or pH change as a measurable proxy for rate
  • standardise plant mass or area, exposure time and non-tested environmental factors
  • correct net gas exchange for respiration when estimating gross photosynthesis

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