Biology HL Complete set of notes: HERE. Topic 1: Cell Theory Topic 2: Molecular Biology Topic 3: Genetics Topic 4: Ecology Topic 5: Evolution and Biodiversity Topic 6: Human Physiology Topic 7: Nucleic Acids Topic 8: Metabolism, Cellular Respiration and Photosynthesis Topic 9: Plant Biology Topic 10: Genetics and Evolution Topic 11: Animal Physiology Option Topic D: Human Physiology