Biology (B) J257,04 Higher June 2018, OCR GCSE Past Papers with Mark Schemes

The OCR GCSE Biology Paper 4 (June 2018) covers plant biology, ecosystems, and human impacts on the environment. Key topics include nitrate ion absorption, carbon cycling in oceans, and pathogen transmission. Practical investigations explore the use of potometers, dialysis tubing for osmosis, and antibiotic testing. The paper emphasizes selective breeding, genetic engineering, and disease management in plants and humans. Concepts like homeostasis, hormone regulation, and the impact of climate change on coral reefs are integrated with ethical considerations and experimental design. Data interpretation and real-world applications are central to the assessment.