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This course builds an integrated foundation in biology centered on how cells are structured and function, how genetic information is stored, expressed, and inherited, and how evolution and ecology generate and explain biological diversity. Core topics include basic biochemistry and enzymes, membrane structure and transport, cellular respiration and photosynthesis, cell division (mitosis/meiosis) and sources of variation, DNA replication and mutation, and the central dogma from gene to phenotype. Quantitative reasoning is introduced through Mendelian probability and Hardy–Weinberg/population-genetics calculations, using classic experiments and real-world case applications to connect molecular changes to organismal fitness and population change.