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IB BIOLOGY

Our IB Biology revision materials are curated to foster a deep love for learning and encourage critical thinking in the realm of biology. 

REVISION NOTES | DOWNLOADABLE PDFS | POWERPOINT PRESENTATIONS | WORKSHEETS | QUIZZES

Theme A: Unity & Diversity

Level 1 - Molecules

Level 2 - Cells

  • A 2.1 - Origins of Cells [HL only]

  • A 2.2 - Cell Structure

  • A 2.3 - Viruses [HL only]

Level 3 - Organisms

  • A 3.1 - Diversity of Organisms

  • A 3.2 Classification and cladistics [HL only] 

Level 4 - Ecosystems

  • A 4.1 - Evolution and speciation

  • A 4.2 - Conservation of biodiversity

Theme B: Form & Function

Level 1 - Molecules

  • B 1.1 - Carbohydrates and lipids

  • B 1.2 - Proteins

Level 2 - Cells

  • B 2.1 - Membranes and membrane transport

  • B 2.2 - Organelles and compartmentalization

  • B 2.3 - Cell Specialization

Level 3 - Organisms

  • B 3.1 - Gas exchanges

  • B 3.2 - Transport

  • B 3.3 - Muscle and motility [HL only]

Level 4 - Ecosystems

  • B 4.1 - Adaptation to environment

  • B 4.2 - Ecological niches

Theme D: Continuity & Change

Level 1 - Molecules

  • D 1.1 - DNA Replication

  • D 1.2 - Protein synthesis

  • D 1.3 - Mutations and gene editing

Level 2 - Cells

  • D 2.1 - Cell and nuclear division

  • D 2.2 - Gene expression [HL only]

  • D 2.3 - Water Potential

Level 3 - Organisms

  • D 3.1 - Reproduction

  • D 3.2 - Inheritance

  • D 3.3 - Homeostasis

Level 4 - Ecosystems

  • D 4.1 - Natural Selection

  • D 4.2 - Stability and change

  • D 4.3 - Climate Change

Theme C: Interaction & Interdependence

Level 1 - Molecules

  • C 1.1 - Enzymes and metabolism

  • C 1.2 - Cell respiration

  • C 1.3 - Photosynthesis

Level 2 - Cells

  • C 2.1 - Chemical signalling [HL only]

  • C 2.2 - Neural signalling

Level 3 - Organisms

  • C 3.1 - Integration of body systems

  • C 3.2 Defence against disease

Level 4 - Ecosystems

  • C 4.1 - Populations and communities

  • C 4.2 - Transfers of energy and matter

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