1. Genetics and Inheritance | DNA base pairing, structure of the DNA double helix, use of Punnett squares for genetic prediction, and factors influencing inherited traits. 2. Bacteria and Disease | Calculation of bacterial growth rates, meaning of pathogens, reasons antibiotics are effective against bacteria, and antibiotic resistance development. 3. Reproduction and Cell Division | Function of sperm and egg cells, chromosome numbers in gametes, mitosis vs. meiosis, and differentiation of stem cells in embryonic development. 4. Selective Breeding and Natural Selection | Risks of genetic similarity in populations, concerns about species extinction due to inbreeding, and methods to maintain genetic diversity in breeding programs. 5. Osmosis and Water Transport | Investigating mass changes in potato cubes due to osmosis, determining equilibrium salt concentration, and reasons why plant cells do not burst in water. 6. Human Health and Reflexes | Factors influencing body mass, health risks from obesity and high BMI, importance of waist-to-hip ratio, and structure and function of a reflex arc in the nervous system.