The OCR GCSE Biology Paper 2 (November 2020) focuses on ecosystem dynamics, genetic inheritance, and human impacts on the environment. Key topics include the carbon cycle, food webs, selective breeding, and natural selection. The paper explores concepts like meiosis, pyramid of biomass, antibiotic resistance, and cancer research. Practical investigations cover capture-recapture methods, composting processes, and enzyme activity. Ethical issues surrounding genetic engineering, conservation, and sustainable practices are addressed alongside biological theories and data interpretation.