IB BIOLOGY
Comprehensive PPTs & Study Guides
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More IB BIOLOGY Resources
Theme A: Unity & Diversity
Level 1 - Molecules
Level 2 - Cells
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A 2.1 - Origins of Cells [HL only]
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A 2.2 - Cell Structure
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A 2.3 - Viruses [HL only]
Level 3 - Organisms
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A 3.1 - Diversity of Organisms
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A 3.2 Classification and cladistics [HL only]
Level 4 - Ecosystems
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A 4.1 - Evolution and speciation
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A 4.2 - Conservation of biodiversity
Theme B: Form & Function
Level 1 - Molecules
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B 1.1 - Carbohydrates and lipids
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B 1.2 - Proteins
Level 2 - Cells
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B 2.1 - Membranes and membrane transport
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B 2.2 - Organelles and compartmentalization
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B 2.3 - Cell Specialization
Level 3 - Organisms
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B 3.1 - Gas exchanges
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B 3.2 - Transport
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B 3.3 - Muscle and motility [HL only]
Level 4 - Ecosystems
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B 4.1 - Adaptation to environment
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B 4.2 - Ecological niches
Theme D: Continuity & Change
Level 1 - Molecules
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D 1.1 - DNA Replication
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D 1.2 - Protein synthesis
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D 1.3 - Mutations and gene editing
Level 2 - Cells
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D 2.1 - Cell and nuclear division
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D 2.2 - Gene expression [HL only]
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D 2.3 - Water Potential
Level 3 - Organisms
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D 3.1 - Reproduction
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D 3.2 - Inheritance
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D 3.3 - Homeostasis
Level 4 - Ecosystems
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D 4.1 - Natural Selection
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D 4.2 - Stability and change
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D 4.3 - Climate Change
Theme C: Interaction & Interdependence
Level 1 - Molecules
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C 1.1 - Enzymes and metabolism
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C 1.2 - Cell respiration
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C 1.3 - Photosynthesis
Level 2 - Cells
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C 2.1 - Chemical signalling [HL only]
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C 2.2 - Neural signalling
Level 3 - Organisms
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C 3.1 - Integration of body systems
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C 3.2 Defence against disease
Level 4 - Ecosystems
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C 4.1 - Populations and communities
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C 4.2 - Transfers of energy and matter