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Biology
9 sections available · 40 chapters available
Free Biology study notes for IB Diploma Programme (DP) - SL & HL students. Each chapter covers a key topic with examples and practice prompts you can continue inside the thinka app.
Theme A — Unity and diversity
A1.1 Water (Molecules)
A1.2 Nucleic acids (Molecules)
A2.1 Origins of cells (Cells, HL)
A2.2 Cell structure (Cells)
A2.3 Viruses (Cells, HL)
A3.1 Diversity of organisms (Organisms)
A3.2 Classification and cladistics (Organisms, HL)
A4.1 Evolution and speciation (Ecosystems)
A4.2 Conservation of biodiversity (Ecosystems)
Unity and diversity
Interaction and interdependance
Theme B — Form and function
B1.1 Carbohydrates and lipids (Molecules)
B1.2 Proteins (Molecules)
B2.1 Membranes and membrane transport (Cells)
B2.2 Organelles and compartmentalization (Cells)
B2.3 Cell specialization (Cells)
B3.1 Gas exchange (Organisms)
B3.2 Transport (Organisms)
B3.3 Muscle and motility (Organisms, HL)
B4.1 Adaptation to environment (Ecosystems)
B4.2 Ecological niches (Ecosystems)
Form and function
Interaction and interdependence
Theme C — Interaction and interdependence
C1.1 Enzymes and metabolism (Molecules)
C1.2 Cell respiration (Molecules)
C1.3 Photosynthesis (Molecules)
C2.1 Chemical signalling (Cells, HL)
C2.2 Neural signalling (Cells)
C3.1 Integration of body systems (Organisms)
C3.2 Defence against disease (Organisms)
C4.1 Populations and communities (Ecosystems)
C4.2 Transfers of energy and matter (Ecosystems)
Theme D — Continuity and change
D1.1 DNA replication (Molecules)
D1.2 Protein synthesis (Molecules)
D1.3 Mutation and gene editing (Molecules)
D2.1 Cell and nuclear division (Cells)
D2.2 Gene expression (Cells, HL)
D2.3 Water potential (Cells)
D3.1 Reproduction (Organisms)
D3.2 Inheritance (Organisms)
D3.3 Homeostasis (Organisms)
D4.1 Natural selection (Ecosystems)
D4.2 Stability and change (Ecosystems)
D4.3 Climate change (Ecosystems)
Continuity and change
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