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C4.2.21—Dependence between respiration and photosynthesis

Dependence between respiration and photosynthesis explains how energy flow, matter cycling or carbon transfer is represented, measured or limited within ecosystems.

Syllabus
First assessment 2025
Objective
C4.2.21
Level
HL

Concept essentials

  • Dependence between respiration and photosynthesis must be linked to the correct source, store, transfer or loss process.
  • The evidence for dependence between respiration and photosynthesis depends on distinguishing energy flow from matter cycling.
  • Dependence between respiration and photosynthesis is clearer when arrows, units and trophic positions match the biological process.
  • Data or diagrams for dependence between respiration and photosynthesis need interpretation as ecosystem transfer evidence.
ConceptIB Biology HL