IB skill practice

Analyse photosynthesis pathways and productivity

Syllabus-aligned Biology HL genetics, evolution, respiration, and photosynthesis skill with approved production seeds.

Paper 1, Paper 2 5 marks Difficulty 5

Interpret limiting factor plateau

A photosynthesis graph in a HL evolution tutorial shows rate increasing with light intensity, then reaching a plateau even as light continues to rise. Explain the plateau. Enter the answer and choose the interpretation that best matches the HL Biology evidence.

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