1. Circulatory System and Blood Flow – Structure and function of the heart, movement of oxygenated blood, role of veins, and importance of valves in maintaining circulation. 2. Homeostasis and Endocrine System – Regulation of blood glucose levels, function of insulin, impact of diabetes, and thermoregulation mechanisms in humans. 3. Photosynthesis and Plant Adaptations – Structure of root hair cells for water absorption, stomata placement in water lilies, sugar transport in plants, and environmental adaptations. 4. Ecosystems and Food Chains – Role of decomposers in nutrient cycling, effect of temperature on decomposition, population control of non-indigenous species, and biodiversity impacts. 5. Respiration and Metabolism – Differences between aerobic and anaerobic respiration, energy consumption at different activity levels, glucose conversion, and kidney filtration processes. 6. Human Population and Food Security – Effects of increasing meat consumption, global malnutrition statistics, energy transfer in food chains, and environmental sustainability concerns.