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AP Biology Biology — by topic
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Cell Communication (44)Gene Expression (31)Biological Macromolecules (28)Cell Structure (25)Structure and Function of Plasma Membranes (24)Cellular Respiration (22)Metabolism (22)Cell Reproduction (20)Mendel's Experiments and Heredity (20)Photosynthesis (20)Meiosis and Sexual Reproduction (20)The Evolution of Populations (18)DNA Structure and Function (18)Ecology and the Biosphere (18)Ecosystems (18)Evolution and the Origin of Species (18)Genes and Proteins (18)Population and Community Ecology (18)The Chemical Foundation of Life (18)Phylogenies and the History of Life (16)