BIOLOGY FOR LIFE
  • New Syllabus⭐
    • Unity and Diversity (A) >
      • A1 molecules >
        • A1.1: Water
        • A1.2: Nucleic Acids
      • A2 Cells >
        • A2.1: Origins of Cells
        • A2.2: Cell Structure
        • A2.3: Viruses
      • A3 Organisms >
        • A3.1: Diversity of Organisms
        • A3.2: Classification and Cladistics
      • A4 Ecosystems >
        • A4.1: Evolution and Speciation
        • A4.2: Conservation of Biodiversity
    • Form and Function (B) >
      • B1 Molecules >
        • B1.1: Carbohydrates and Lipids
        • B1.2: Proteins
      • B2 Cells >
        • B2.1 Membranes and Membrane Transport
        • B2.2 Organelles and Compartmentalization
        • B2.3 Cell Specialization
      • B3 Organisms >
        • B3.1 Gas Exchange
        • B3.2 Transport
        • B3.3 Muscle and Motility
      • B4 Ecosystems >
        • B4.1 Adaptation to Environment
        • B4.2 Ecological Niches
    • Interaction and Interdependence (C) >
      • C1 Molecules >
        • C1.1: Enzymes and Metabolism
        • C1.2: Cell Respiration
        • C1.3: Photosynthesis
      • C2 Cells >
        • C2.1: Chemical Signaling
        • C2.2: Neural Signaling
      • C3 Organisms >
        • C3.1: Integration of Body Systems
        • C3.2: Defense Against Disease
      • C4 Ecosystems >
        • C4.1 Populations and Communities
        • C4.2 Transfers of Energy and Matter
    • Continuity and Change (D) >
      • D1 Molecules >
        • D1.1: DNA Replication
        • D1.2: Protein Synthesis
        • D1.3: Mutation and Gene Editing
      • D2 Cells >
        • D2.1: Cell and Nuclear Division
        • D2.2: Gene Expression
        • D2.3: Water Potential
      • D3 Organisms >
        • D3.1: Reproduction
        • D3.2: Inheritance
        • D3.3: Homeostasis
      • D4 Ecosystems >
        • D4.1: Natural Selection
        • D4.2: Stability and Change
        • D4.3: Climate Change
  • Syllabus
    • Core >
      • 1: Cell Biology >
        • 1.1: Introduction to Cells
        • 1.2: Ultrastructure of Cells
        • 1.3: Membrane Structure
        • 1.4: Membrane Transport
        • 1.5: The Origin of Cells
        • 1.6: Cell Division
      • 2: Molecular Biology >
        • 2.1: Molecules to Metabolism
        • 2.2: Water
        • 2.3: Carbohydrates and Lipids
        • 2.4: Proteins
        • 2.5: Enzymes
        • 2.6: DNA and RNA
        • 2.7: DNA Replication, Transcription and Translation
        • 2.8: Cell Respiration
        • 2.9: Photosynthesis
      • 3: Genetics >
        • 3.1: Genes
        • 3.2: Chromosomes
        • 3.3: Meiosis
        • 3.4: Inheritance
        • 3.5: Genetic Modification and Biotechnology
      • 4: Ecology >
        • 4.1: Species, Communities and Ecosystems
        • 4.2: Energy Flow
        • 4.3: Carbon Cycling
        • 4.4: Climate Change
      • 5: Evolution and Biodiversity >
        • 5.1: Evidence for Evolution
        • 5.2: Natural Selection
        • 5.3: Classification and Biodiversity
        • 5.4: Cladistics
      • 6: Human Physiology >
        • 6.1: Digestion and Absorption
        • 6.2: The Blood System
        • 6.3: Defense Against Infectious Disease
        • 6.4: Gas Exchange
        • 6.5: Neurons and Synapses
        • 6.6: Hormones, Homeostasis and Reproduction
    • Higher Level >
      • 7: Nucleic Acids >
        • 7.1: DNA Structure and Replication
        • 7.2: Transcription and Gene Expression
        • 7.3: Translation
      • 8: Metabolism, Cell Respiration & Photosynthesis >
        • 8.1: Metabolism
        • 8.2: Cell Respiration
        • 8.3: Photosynthesis
      • 9: Plant Biology >
        • 9.1: Transport in the Xylem of Plants
        • 9.2: Transport in the Phloem of Plants
        • 9.3: Growth in Plants
        • 9.4: Reproduction in Plants
      • 10: Genetics and Evolution >
        • 10.1: Meiosis
        • 10.2: Inheritance
        • 10.3: Gene Pools and Speciation
      • 11: Animal Physiology >
        • 11.1: Antibody Production and Vaccination
        • 11.2: Movement
        • 11.3: Kidney and Osmoregulation
        • 11.4: Sexual Reproduction
    • Options >
      • D: Human Physiology >
        • D.1: Human Nutrition
        • D.2: Digestion
        • D.3: Functions of the Liver
        • D.4: The Heart
        • D.5: Hormones and Metabolism
        • D.6: Transport of Respiratory Gases
  • IB Requirements
    • Learner Profile
    • Group 4 Project
    • External Exam
    • Internal Assessment >
      • HL class of 2024 >
        • Personal Engagement
        • Exploration
        • Analysis
        • Evaluation
        • Communication
      • SL class of 2024 >
        • Research Design
        • Analysis
        • Conclusion
        • Evaluation
    • Extended Essay
  • Investigation Skills
    • Lab Safety
    • Microscopy
    • Lab Drawings
    • Data Tables
    • Measurement
    • Statistics >
      • Descriptive Statistics >
        • Outliers
        • Skew
        • Measures of Central Tendancy
        • Measures of Spread
        • Pearson Correlation
      • Inferential Statistics >
        • T-Test
        • ANOVA
        • Kruskal-Wallis
        • X2 Test for Independence
        • X2 Goodness of Fit
    • Graphing >
      • Graphing with Excel
      • Interpreting Error Bars
    • Error Analysis
  • Course Info
    • Above & Beyond >
      • Biology Club
      • Pumpkin Carving
      • Scavenger Hunt
      • Science News
      • IB Bio Dance
      • Wood Duck Project
      • Invasive Crayfish Project
    • Assessment >
      • Class Grading IB Bio I
      • Class Grading IB Bio II
      • Daily Quizzes
      • Lab Practicals
    • Class Photos
    • Recommendations
    • Supplemental Reading
  • Contact
  • About
    • Philosophy
    • Resume
    • Reflection
    • Site Feedback
    • Favorite Quotes
    • AEF Blog
  • Expeditions
    • Bahamas (2009)
    • Trinidad (2010)
    • Trinidad (2011)
    • Ecuador (2012)
    • Trinidad (2013)
    • Peru (2014)
    • Bahamas (2015)
    • Peru (2016)
    • Costa Rica (2017)
    • Costa Rica (2018)
    • Arizona (2022)
    • Florida (2023)
  • Summer Ecology Research
  • Teacher Resources

THEME C:  Interaction and Interdependence

The biology course is organized by theme.  Both standard level (SL) students and higher level (HL) students study the four themes at four levels of biological organization (molecules, cells, organisms and ecosystems).  HL students study some of these topics to greater depth. 

Theme C is Interaction and Interdependence
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C1:  Interaction and Interdependence of Molecules​
C1.1 Enzymes and Metabolism
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C1.2 Cell Respiration
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C1.3 Photosynthesis
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C2:  Interaction and Interdependence of Cells
C2.1 Chemical Signaling (HL only)
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C2.2 Neural Signaling
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C3:  Interaction and Interdependence of Organisms
C3.1  Integration of Body Systems
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C3.2 Defense Against Disease
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C4:  Interaction and Interdependence of Ecosystems
C4.1 Populations and Communities
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​C4.2 Transfers of Energy and Matter
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​
Picture
  • New Syllabus⭐
    • Unity and Diversity (A) >
      • A1 molecules >
        • A1.1: Water
        • A1.2: Nucleic Acids
      • A2 Cells >
        • A2.1: Origins of Cells
        • A2.2: Cell Structure
        • A2.3: Viruses
      • A3 Organisms >
        • A3.1: Diversity of Organisms
        • A3.2: Classification and Cladistics
      • A4 Ecosystems >
        • A4.1: Evolution and Speciation
        • A4.2: Conservation of Biodiversity
    • Form and Function (B) >
      • B1 Molecules >
        • B1.1: Carbohydrates and Lipids
        • B1.2: Proteins
      • B2 Cells >
        • B2.1 Membranes and Membrane Transport
        • B2.2 Organelles and Compartmentalization
        • B2.3 Cell Specialization
      • B3 Organisms >
        • B3.1 Gas Exchange
        • B3.2 Transport
        • B3.3 Muscle and Motility
      • B4 Ecosystems >
        • B4.1 Adaptation to Environment
        • B4.2 Ecological Niches
    • Interaction and Interdependence (C) >
      • C1 Molecules >
        • C1.1: Enzymes and Metabolism
        • C1.2: Cell Respiration
        • C1.3: Photosynthesis
      • C2 Cells >
        • C2.1: Chemical Signaling
        • C2.2: Neural Signaling
      • C3 Organisms >
        • C3.1: Integration of Body Systems
        • C3.2: Defense Against Disease
      • C4 Ecosystems >
        • C4.1 Populations and Communities
        • C4.2 Transfers of Energy and Matter
    • Continuity and Change (D) >
      • D1 Molecules >
        • D1.1: DNA Replication
        • D1.2: Protein Synthesis
        • D1.3: Mutation and Gene Editing
      • D2 Cells >
        • D2.1: Cell and Nuclear Division
        • D2.2: Gene Expression
        • D2.3: Water Potential
      • D3 Organisms >
        • D3.1: Reproduction
        • D3.2: Inheritance
        • D3.3: Homeostasis
      • D4 Ecosystems >
        • D4.1: Natural Selection
        • D4.2: Stability and Change
        • D4.3: Climate Change
  • Syllabus
    • Core >
      • 1: Cell Biology >
        • 1.1: Introduction to Cells
        • 1.2: Ultrastructure of Cells
        • 1.3: Membrane Structure
        • 1.4: Membrane Transport
        • 1.5: The Origin of Cells
        • 1.6: Cell Division
      • 2: Molecular Biology >
        • 2.1: Molecules to Metabolism
        • 2.2: Water
        • 2.3: Carbohydrates and Lipids
        • 2.4: Proteins
        • 2.5: Enzymes
        • 2.6: DNA and RNA
        • 2.7: DNA Replication, Transcription and Translation
        • 2.8: Cell Respiration
        • 2.9: Photosynthesis
      • 3: Genetics >
        • 3.1: Genes
        • 3.2: Chromosomes
        • 3.3: Meiosis
        • 3.4: Inheritance
        • 3.5: Genetic Modification and Biotechnology
      • 4: Ecology >
        • 4.1: Species, Communities and Ecosystems
        • 4.2: Energy Flow
        • 4.3: Carbon Cycling
        • 4.4: Climate Change
      • 5: Evolution and Biodiversity >
        • 5.1: Evidence for Evolution
        • 5.2: Natural Selection
        • 5.3: Classification and Biodiversity
        • 5.4: Cladistics
      • 6: Human Physiology >
        • 6.1: Digestion and Absorption
        • 6.2: The Blood System
        • 6.3: Defense Against Infectious Disease
        • 6.4: Gas Exchange
        • 6.5: Neurons and Synapses
        • 6.6: Hormones, Homeostasis and Reproduction
    • Higher Level >
      • 7: Nucleic Acids >
        • 7.1: DNA Structure and Replication
        • 7.2: Transcription and Gene Expression
        • 7.3: Translation
      • 8: Metabolism, Cell Respiration & Photosynthesis >
        • 8.1: Metabolism
        • 8.2: Cell Respiration
        • 8.3: Photosynthesis
      • 9: Plant Biology >
        • 9.1: Transport in the Xylem of Plants
        • 9.2: Transport in the Phloem of Plants
        • 9.3: Growth in Plants
        • 9.4: Reproduction in Plants
      • 10: Genetics and Evolution >
        • 10.1: Meiosis
        • 10.2: Inheritance
        • 10.3: Gene Pools and Speciation
      • 11: Animal Physiology >
        • 11.1: Antibody Production and Vaccination
        • 11.2: Movement
        • 11.3: Kidney and Osmoregulation
        • 11.4: Sexual Reproduction
    • Options >
      • D: Human Physiology >
        • D.1: Human Nutrition
        • D.2: Digestion
        • D.3: Functions of the Liver
        • D.4: The Heart
        • D.5: Hormones and Metabolism
        • D.6: Transport of Respiratory Gases
  • IB Requirements
    • Learner Profile
    • Group 4 Project
    • External Exam
    • Internal Assessment >
      • HL class of 2024 >
        • Personal Engagement
        • Exploration
        • Analysis
        • Evaluation
        • Communication
      • SL class of 2024 >
        • Research Design
        • Analysis
        • Conclusion
        • Evaluation
    • Extended Essay
  • Investigation Skills
    • Lab Safety
    • Microscopy
    • Lab Drawings
    • Data Tables
    • Measurement
    • Statistics >
      • Descriptive Statistics >
        • Outliers
        • Skew
        • Measures of Central Tendancy
        • Measures of Spread
        • Pearson Correlation
      • Inferential Statistics >
        • T-Test
        • ANOVA
        • Kruskal-Wallis
        • X2 Test for Independence
        • X2 Goodness of Fit
    • Graphing >
      • Graphing with Excel
      • Interpreting Error Bars
    • Error Analysis
  • Course Info
    • Above & Beyond >
      • Biology Club
      • Pumpkin Carving
      • Scavenger Hunt
      • Science News
      • IB Bio Dance
      • Wood Duck Project
      • Invasive Crayfish Project
    • Assessment >
      • Class Grading IB Bio I
      • Class Grading IB Bio II
      • Daily Quizzes
      • Lab Practicals
    • Class Photos
    • Recommendations
    • Supplemental Reading
  • Contact
  • About
    • Philosophy
    • Resume
    • Reflection
    • Site Feedback
    • Favorite Quotes
    • AEF Blog
  • Expeditions
    • Bahamas (2009)
    • Trinidad (2010)
    • Trinidad (2011)
    • Ecuador (2012)
    • Trinidad (2013)
    • Peru (2014)
    • Bahamas (2015)
    • Peru (2016)
    • Costa Rica (2017)
    • Costa Rica (2018)
    • Arizona (2022)
    • Florida (2023)
  • Summer Ecology Research
  • Teacher Resources