Photosynthesis is a process by which plants synthesize glucose and oxygen in presence of sunlight through light dependent reactions by utilization of sunlight, water to synthesize oxygen, ATP and NADPH and light-independent reactions to synthesize carbon dioxide and carbohydrates. Cellular respiration is a metabolic pathway that breaks down glucose through glycolysis, pyruvate oxidation, citric acid / Krebs cycle and oxidative phosphorylation. Primary producers produce energy and consumers derive energy from primary producers. Primary productivity is the accumulation of energy in form of biomass. Integrating biological science and mathematics helps to understand how differential regulation of factors impacting metabolic pathways and processes impact primary productivity.