Assess understanding of photosynthesis and cellular respiration by comparing their processes, energy transformations, and interdependence. Tasks include describing locations and key stages (light reactions and Calvin cycle; glycolysis, Krebs, electron transport), writing and balancing overall equations, tracing energy flow (light → chemical → ATP) and matter cycles (CO2, O2, glucose), explaining how products of one process serve as reactants for the other, and interpreting diagrams or data to predict effects of environmental or genetic changes.