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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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13 interactive simulations across 11 topics — browse the Simulation Lab →

ContentsBiology HL · 40 topics

Section · 40 topics

Topics

◆Water2 simsA1.1CONTINUENucleic acidsA1.2Origins of cellsA2.1Cell structureA2.2VirusesA2.3Diversity of organismsA3.1Classification and cladisticsA3.2Evolution and speciationA4.1Conservation of biodiversityInteractive diagramA4.2Carbohydrates and lipidsB1.1ProteinsB1.2Membranes and membrane transport1 simB2.1Organelles and compartmentalizationB2.2Cell specialization1 simB2.3Gas exchangeB3.1Transport1 simB3.2Muscle and motilityB3.3Adaptation to environmentB4.1Ecological nichesB4.2Enzymes and metabolismInteractive diagram1 simC1.1Cell respirationC1.2PhotosynthesisC1.3Chemical signalling1 simC2.1Neural signalling1 simC2.2Integration of body systemsC3.1Defence against infectious diseaseC3.2Populations and communities2 simsC4.1Transfers of energy and matterC4.2DNA replicationD1.1Protein synthesisD1.2Mutation and gene editingD1.3Cell and nuclear divisionInteractive diagramD2.1Gene expression1 simD2.2Water potentialD2.3ReproductionD3.1Inheritance1 simD3.2HomeostasisD3.3Natural selectionD4.1Stability and changeD4.2Climate change1 simD4.3
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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".

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