Biology (Biology) — free IB HL course
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Higher Level · biology-hl · Free premium course
Biology
40 premium lessons live for IB Diploma Biology. Learn visually, read concise notes, then practise with criterion marking on every topic.
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Topics
◆WaterA1.1CONTINUE→Nucleic acidsA1.2→Origins of cellsA2.1→Cell structureA2.2→VirusesA2.3→Diversity of organismsA3.1→Classification and cladisticsA3.2→Evolution and speciationA4.1→Conservation of biodiversityA4.2→Carbohydrates and lipidsB1.1→ProteinsB1.2→Membranes and membrane transportB2.1→Organelles and compartmentalizationB2.2→Cell specializationB2.3→Gas exchangeB3.1→TransportB3.2→Muscle and motilityB3.3→Adaptation to environmentB4.1→Ecological nichesB4.2→Enzymes and metabolismC1.1→Cell respirationC1.2→PhotosynthesisC1.3→Chemical signallingC2.1→Neural signallingC2.2→Integration of body systemsC3.1→Defence against infectious diseaseC3.2→Populations and communitiesC4.1→Transfers of energy and matterC4.2→DNA replicationD1.1→Protein synthesisD1.2→Mutation and gene editingD1.3→Cell and nuclear divisionD2.1→Gene expressionD2.2→Water potentialD2.3→ReproductionD3.1→InheritanceD3.2→HomeostasisD3.3→Natural selectionD4.1→Stability and changeD4.2→Climate changeD4.3→
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Free IB Biology HL course — 40 topics
Revise IB Diploma Biology (Higher Level) topic by topic. This free course covers 40 official syllabus points with visual lessons, worked examples, and markband-aligned past-paper practice. Each topic links to IB criterion practice on MarkScheme — a free alternative to paid note sites for students searching "IB Biology notes" or "IB Biology revision".