Biology revision.
IB Biology revision resources with notes, flashcards, original practice and answer guidance. Explore IB Study Room.
Open Biology workspaceWhat you can use
Read topic notes, review flashcards and attempt original practice questions. Compare your written answers with suggested markschemes and solutions. Relevant quantitative lessons include equation references.
Choose your study level inside the workspace. HL extensions are labelled and filtered by level.
Topics and guidance
- Water
- Nucleic acids
- Origins of cells · HL
- Cell structure
- Viruses · HL
- Diversity of organisms
- Classification and cladistics · HL
- Evolution and speciation
- Conservation of biodiversity
- Carbohydrates and lipids
- Proteins
- Membranes and transport
- Organelles and compartmentalization
- Cell specialization
- Gas exchange
- Transport
- Muscle and motility · HL
- Adaptation to environment
- Ecological niches
- Enzymes and metabolism
- Cell respiration
- Photosynthesis
- Chemical signalling · HL
- Neural signalling
- Integration of body systems
- Defence against disease
- Populations and communities
- Transfers of energy and matter
- DNA replication
- Protein synthesis
- Mutations and gene editing
- Cell and nuclear division
- Gene expression · HL
- Water potential
- Reproduction
- Inheritance
- Homeostasis
- Natural selection
- Sustainability and change
- Climate change
- Scientific investigation and data
Coverage and course references
Expanded revision across all40 main biology headings, with SL foundations and additional HL explanations. This is not a certified statement-by-statement complete course.
Check the detailed course map and assessment references for the specification covered. Later exam sessions may use a revised syllabus. Notes and practice have not been independently verified throughout.
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