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This course develops a foundational understanding of living systems through core biological principles and scientific inquiry. Topics include the characteristics and organization of life; biochemistry of macromolecules, enzymes, and ATP; cell theory, structure, membranes, and transport; energy and matter flow via cellular respiration and photosynthesis; and cell division through mitosis and meiosis. It introduces genetics from DNA structure to inheritance and gene expression, connects variation to evolution and biodiversity, and applies ecological thinking to ecosystems, cycles, populations, and human impacts. Emphasis is placed on experimental design, data interpretation, and evidence-based biological reasoning.