Biology (First Assessment 2025) Topic 1 - Cells 1.1 | Cell structure (plus HL) Biology-2025 | Topic-1 | 1.2 | Organelles and Compartmentalization Biology-2025 | Topic-1 | 1.3 | Membranes and membrane transport (plus HL) Biology-2025 | Topic-1 | 1.4 | Cell specialization (plus HL) Biology-2025 | Topic-1 | 1.5 | Cell and nuclear division (plus HL) Biology-2025 | Topic-1 | 1.6 | Origins of cells (HL) Biology-2025 | Topic-1 | 1.7 | Viruses (HL) Biology-2025 | Topic-1 | Topic 2 - Water 2.1 | Water (plus HL) Biology-2025 | Topic-2 | 2.2 Water potential (plus HL) Biology-2025 | Topic-2 | Topic 3 - Organic compounds 3.1 | Proteins (plus HL) Biology-2025 | HL,SL,Topic-3 | 3.2 | Carbohydrates and lipids Biology-2025 | SL,Topic-3 | 3.3 | Enzymes and metabolism (plus HL) Biology-2025 | HL,SL,Topic-3 | Topic 4 - Nucleic acids 4.1 | Nucleic acids (plus HL) Biology-2025 | HL,SL,Topic-4 | 4.2 | DNA Replication (plus HL) Biology-2025 | HL,SL,Topic-4 | 4.3 | Protein synthesis (plus HL) Biology-2025 | HL,SL,Topic-4 | Topic 5 - Genetics 5.1 | Meiosis Biology-2025 | SL,Topic-5 | 5.2 Inheritance (plus HL) Biology-2025 | HL,SL,Topic-5 | 5.3 | Mutation and gene editing (plus HL) Biology-2025 | HL,SL,Topic-5 | 5.4 | Gene expression (HL Only) Biology-2025 | HL,Topic-5 | Topic 6 - Ecology 6.1 | Adaptation to environment Biology-2025 | SL,Topic-6 | 6.2 | Climate change (plus HL) Biology-2025 | HL,SL,Topic-6 | 6.3 | Ecological niches Biology-2025 | SL,Topic-6 | 6.4 | Diversity of organisms (plus HL) Biology-2025 | HL,SL,Topic-6 | 6.5 | Conservation of biodiversity Biology-2025 | SL,Topic-6 | 6.6 | Populations and communities Biology-2025 | SL,Topic-6 | 6.7 | Stability and change (plus HL) Biology-2025 | HL,SL,Topic-6 | 6.8 | Transfers of energy and matter Biology-2025 | SL,Topic-6 | Topic 7 - Evolution 7.1 | Natural selection (plus HL) Biology-2025 | HL,SL,Topic-7 | 7.2 | Evolution and Speciation (Plus HL) Biology-2025 | HL,SL,Topic-7 | 7.3 | Classification and Cladistics (HL only) Biology-2025 | HL,Topic-7 |
