AP Biology Videos
Chapter 1: Evolution, the Themes of Biology, and Scientific Inquiry
- Animation - Heritable Information: DNA
- Animation - Introduction to Experimental Design
- Animation - Negative Feedback
- Animation - Positive Feedback
- Video - Sea Horse Camouflage
- Video - Galápagos Biodiversity by Peter and Rosemary Grant
- HHMI BioInteractive - The Origin of Species: The Beak of the Finch
- Bozeman - Environmental Matter Exchange
- Bozeman - Three Domains of Life
Chapter 2: The Chemical Context of Life
- Animation - Atomic Number and Atomic Mass
- Animation - Electron Distribution Diagrams
- Animation - Formation of Ions and Ionic Bonds
- Animation - Introduction to Chemical Bonds
- Animation - Nonpolar and Polar Molecules
- Figure Walkthrough - Energy Levels of an Atom's Electrons
Chapter 3: Water and Life
- Animation - Polarity of Water
- Animation - Cohesion of Water
- Animation - Water Transport in Plants
- Animation - Acids, Bases, and pH
- Animation - Dissociation of Water Molecules
- BioFlix - Adhesion and Cohesion in Plants
- Bozeman - Water - A Polar Molecule
Chapter 4: Carbon and the Molecular Diversity of Life
- Animation - Diversity of Carbon-Based Molecules
- Animation - Functional Groups
Chapter 5: The Structure and Function of Large Biological Molecules
- Animation - Making and Breaking Polymers
- Animation - Starch, Cellulose, and Glycogen Structures
- Animation - Synthesis of Sucrose
- Animation - Space-Filling Model of a Phospholipid
- Animation - Protein Functions
- Animation - Protein Structure
- Animation - Nucleic Acid Structure
- Figure Walkthrough - The Structure of a Phospholipid
- HHMI BioInteractive - Sickle-Cell Disease
- HHMI BioInteractive - Paired DNA Strands
- HHMI BioInteractive - The Chemical Structure of DNA
- HHMI BioInteractive - The Making of the Fittest: The Birth and Death of Genes (Icefish)
- Bozeman - Biological Molecules
Chapter 6: A Tour of the Cell
- Animation - Metric System Review
- Animation - Prokaryotic Cell Structure and Function
- Animation - Cilia and Flagella
- Video - Cytoplasmic Streaming
- Video - Flagellum Beating with ATP
- Video - Flagellum Movement in Swimming Sperm
- Figure Walkthrough - Geometric Relationships Between Surface Area and Volume
- BioFlix - Tour of a Plant Cell
- BioFlix - Tour of an Animal Cell
- BioFlix - Nucleus and Ribosomes
- BioFlix - Endomembrane System
- BioFlix - Chloroplasts and Mitochondria
- BioFlix - Actin and Myosin in Muscle Contraction
- Bozeman - Cellular Organelles
- Bozeman - Compartmentalization
Chapter 7: Membrane Structure and Function
- Animation - Functions of the Plasma Membrane
- Animation - Structure of the Plasma Membrane
- Animation - Selective Permeability of Membranes
- Animation - Aquaporin in a Phospholipid Bilayer
- Animation - Single Aquaporin
- Animation - Facilitated Diffusion
- Animation - Osmosis and Water Balance in Cells
- Animation - Active Transport
- Animation - Exocytosis and Endocytosis
- Animation - Sodium-Potassium Pump
- Video - Plasmolysis in Elodea
- Figure Walkthrough - Osmosis
- BioFlix - Membrane Transport
- BioFlix - Exocytosis and Endocytosis
- Bozeman - Transport Across Cell Membranes
Chapter 8: An Introduction to Metabolism
- Animation - Energy Transformations
- Animation - Exergonic and Endergonic Reactions
- Animation - Metabolism Overview
- Animation - Space-Filling Model of ATP
- Animation - Stick Model of ATP
- Animation - The Structure of ATP
- Animation - Enzymes: Competitive Inhibition
- Animation - Enzymes: Noncompetitive Inhibition
- Animation - Enzymes: Steps in a Reaction
- Animation - Enzymes: Induced Fit
- Animation - How Enzymes Work
- Figure Walkthrough - How ATP Drives Chemical Work: Energy Coupling Using ATP Hydrolysis
- Bozeman - Life Requires Free Energy
- Bozeman - ATP - Adenosine Triphosphate
Chapter 9: Cellular Respiration and Fermentation
- Animation - Energy Flow and Chemical Recycling
- Animation - Overview of Cellular Respiration
- Animation - The Citric Acid Cycle
- Animation - ATP Yield from Cellular Respiration
- Animation - Electron Transport
- Animation - Electron Transport Chain: Factors Affecting ATP Yield
- Animation - Rotating ATP Synthase
- Animation - ATP Synthase Side View
- Animation - ATP Synthase Top View
- Figure Walkthrough - Free-Energy Change During Electron Transport
- BioFlix - Cellular Respiration
- BioFlix - Introduction to Cellular Respiration
- BioFlix - The Citric Acid Cycle
- BioFlix - Electron Transport
- Bozeman - Photosynthesis and Respiration
Chapter 10: Photosynthesis
- Animation - Light Energy and Pigments
- Animation - Space-Filling Model of Chlorophyll
- Animation - The Light Reactions
- Animation - The Calvin Cycle
- Animation - Photosynthesis in Dry Climates
- Video - Chloroplasts in Motion
- Figure Walkthrough - How Linear Electron Flow During the Light Reactions Generates ATP and NADPH
- BioFlix - Tour of a Plant Cell
- BioFlix - The Flow of Carbon Atoms in Producers, Consumers, and Decomposers
- BioFlix - The Light Reactions
- HHMI BioInteractive - Photosynthesis
- Bozeman - Photosynthesis and Respiration
Chapter 11: Cell Communication
- Animation - Overview of Cell Signaling
- Animation - Acetylcholine Receptor
- Animation - Steroid Hormone Pathway
- Animation - Signal Transduction Pathways
- Animation - Cytoplasmic Response: Glycogen Breakdown
- Animation - Nuclear Response: Activating a Gene
- Video - Phosphate-Induced Apoptosis
- BioFlix - Mechanism of Hormone Action: Second Messenger cAMP
- BBC Video - Brushing Your Teeth Can Save Your Life
- HHMI BioInteractive - Interview with Bonnie Bassler
- Bozeman - Evolutionary Significance of Cell Communication
- Bozeman - Cell Communication
- Bozeman - Signal Transduction Pathways
- Bozeman - Effects of Changes in Pathways
Chapter 12: The Cell Cycle
- Animation - Cell Division in Bacteria
- Animation - Microtubule Depolymerization
- Animation - Control of the Cell Cycle
- Video - Animal Mitosis (Time-Lapse)
- Video - Microtubules in Anaphase
- Video - Cytokinesis in an Animal Cell
- Video - Nuclear Envelope Breakdown and Formation During Mitosis in C. elegans, a Eukaryote
- Video - Spindle Formation During Mitosis
- Video - Sea Urchin Development
- Figure Walkthrough - Two Important Checkpoints
- BioFlix - Chromosome Duplication
- BBC Video - Are Fruit Flies the Key in the Fight Against Cancer?
- HHMI BioInteractive - How Tumors Grow
- Bozeman - Cell Cycle, Mitosis, and Meiosis
Chapter 13: Meiosis and Sexual Life Cycles
- Animation - Asexual Reproduction
- Animation - The Human Life Cycle
- Animation - Overview of Meiosis
- Animation - Genetic Variation from Crossing Over
- Animation - Genetic Variation from Independent Assortment of Chromosomes
- Animation - Genetic Variation from Random Fertilization
- Video - Meiosis I in Sperm Production
- Figure Walkthrough - A Comparison of Mitosis and Meiosis
- Bozeman - Cell Cycle, Mitosis, and Meiosis
- Bozeman - Mechanisms That Increase Genetic Variation
Chapter 14: Mendel and the Gene Idea
- Animation - Independent Assortment
- Animation - Mendel's Cross of One Character: Flower Color
- Animation - Cross of One Character in "MendAliens"
- Animation - Simplified Crosses of One Character in Humans
- Animation - Mendel's Cross of Two Characters: Seed Shape and Seed Color
- Animation - Crosses of Two Characters in "MendAliens"
- Animation - A Simplified Cross of Two Characters in Humans
- Animation - Testcross in "MendAliens"
- Animation - Incomplete Dominance in "MendAliens"
- Figure Walkthrough - Alleles, Alternative Versions of a Gene
- BBC Video - Genetics vs. Environment
- HHMI BioInteractive - Sickle-Cell Disease
- HHMI BioInteractive - The Biology of Skin Color
- HHMI BioInteractive - The Making of the Fittest: Natural Selection in Humans (Sickle-Cell Disease)
Chapter 15: The Chromosomal Basis of Inheritance
- Animation - The Chromosomal Basis of Independent Assortment
- Animation - X-Linked Genes in "MendAliens"
- Animation - Linked Genes and Crossing Over
- Animation - Alterations of Chromosome Structure
- Animation - Polyploid Plants
- Video - Nondisjunction During Animal Cell Mitosis
- Figure Walkthrough - The chromosomal Basis of Mendel's Laws
- HHMI BioInteractive - X Inactivation
Chapter 16: The Molecular Basis of Inheritance
- Animation - Bacteriophage Reproduction
- Animation - DNA Surface Model
- Animation - DNA and RNA Structure
- Animation - DNA Double Helix
- Animation - The Hershey-Chase Experiment
- Animation - DNA Replication: A Closer Look
- Animation - DNA Replication: An Overview
- Figure Walkthrough - Addition of a Nucleotide to a DNA Strand
- BioFlix - Synthesis of the Lagging Strand
- BioFlix - Synthesis of the Leading Strand
- BioFlix - The Replication Fork in E. coli
- BBC Video - Can Humans Live Forever?
- HHMI BioInteractive - Chargaff's Ratio
- HHMI BioInteractive - Great Discoveries in Science: The Double Helix
- Bozeman - DNA and RNA - Part 1
- Bozeman - DNA and RNA - Part 2
Chapter 17: Gene Expression: From Gene to Protein
- Animation - Overview of Protein Synthesis in Bacteria
- Animation - Overview of Protein Synthesis in Eukaryotes
- Animation - The Genetic Code
- Animation - Elongation of the RNA Strand
- Animation - Overview of Transcription
- Animation - Overview of Transcription in Bacteria
- Animation - Adding the 5' Cap and Poly-A Tail
- Animation - Elongation Cycle of Translation
- Animation - Initiation of Translation
- Animation - Overview of Translation
- Animation - tRNA Stick Model
- Animation - Termination of Translation
- Video - Cotranslational Translocation
- Figure Walkthrough - Types of Small-Scale Mutations That Affect mRNA Sequence
- BioFlix - Protein Processing
- HHMI BioInteractive - Sickle-Cell Disease
- HHMI BioInteractive - RNA Folding
- HHMI BioInteractive - Jennifer Doudna: CRISPR Provides a Tool for Changing Genes
- Bozeman - Genotypes and Phenotypes
- Bozeman - DNA and RNA - Part 2
Chapter 18: Regulation of Gene Expression
- Animation - Overview of Cell Signaling
- Animation - The lac Operon in E. coli
- Animation - Control of Gene Expression
- Animation - Post Transcriptional Control Mechanisms
- Animation - Regulation of Transcriptional Activators and Enhancers
- Animation - Role of bicoid Gene in Drosophila Development
- Animation - Causes of Cancer
- Figure Walkthrough - The lac Operon in E. coli: Regulated Synthesis of Inducible Enzymes
- HHMI BioInteractive - Regulation of Eukaryotic DNA Transcription
- HHMI BioInteractive - Role of MECP2 in Gene Silencing
- HHMI BioInteractive - Using p53 to Fight Cancer
- Bozeman - Genotype Expression
- Bozeman - Cellular Specialization
- Bozeman - Development - Timing and Coordination
Chapter 19: Viruses
- Animation - Phage Lysogenic and Lytic Cycles
- Animation - Phage Lytic Cycle
- Animation - Retrovirus (HIV) Replicative Cycle
- Animation - Simplified Viral Replicative Cycle
- Animation - Prions: Characteristics
- Animation - Prions: Diseases
- BBC Video - Know Your Enemy: Bacteria vs. Viruses
- HHMI BioInteractive - Biology of SARS-CoV-2
- HHMI BioInteractive - HIV Replicative Cycle
- HHMI BioInteractive - Interview with Katie Walter
- HHMI BioInteractive - Jennifer Doudna: CRISPR-Cas9 was First Discovered in Bacteria
- HHMI BioInteractive - Jennifer Doudna: Science is a Serendipitous Endeavor
- HHMI BioInteractive - Genetically Modified Mosquitoes
- HHMI BioInteractive - Treating HIV Infection with a Reverse Transcriptase Inhibitor
Chapter 20: DNA Tools and Biotechnology
- Animation - Copying DNA Through PCR
- Animation - Creating Recombinant DNA
- Animation - Gel Electrophoresis of DNA
- Animation - Restriction Enzymes
- Animation - Genetic Profiles
- BBC Video - Cystic Fibrosis and the Promise of Gene Therapy
- HHMI BioInteractive - Jennifer Doudna: CRISPR Provides a Tool for Changing Genes
- HHMI BioInteractive - Genetic Engineering
- HHMI BioInteractive - Polymerase Chain Reaction (PCR)
- HHMI BioInteractive - Sanger Method of DNA Sequencing
- HHMI BioInteractive - Jennifer Doudna: CRISPR-Cas Proteins are the Swiss Army Knife of the Genome
- HHMI BioInteractive - Creating Embryonic Stem Cell Lines
- HHMI BioInteractive - Gene Chip Manufacturing
- HHMI BioInteractive - Somatic Cell Nuclear Transfer
- HHMI BioInteractive - Somatic Cell Nuclear Transfer Video
- HHMI BioInteractive - Gene Therapy
- HHMI BioInteractive - Genes as Medicine
- HHMI BioInteractive - Gleevec
- HHMI BioInteractive - The Search for a Mutated Gene
- Bozeman - DNA Fingerprinting
Chapter 21: Genomes and their Evolution
- Animation - The Human Genome Project: Genes of Human Chromosome 17
- BBC Video - Collecting New Genes to Create New Life
- HHMI BioInteractive - Gene Chip Manufacturing
- HHMI BioInteractive - Shotgun Sequencing
- HHMI BioInteractive - Leading Edge Bioinformatics
- HHMI BioInteractive - Coding Sequences in DNA
- Bozeman - Cellular Variation
Chapter 22: Descent with Modification: A Darwinian View of Life
- Video - Sea Horse Camouflage
- Figure Walkthrough - Tree Thinking: Information Provided in an Evolutionary Tree
- Figure Walkthrough - The Transition to Life in the Sea
- BBC Video - A Future Without Antibiotics?
- HHMI BioInteractive - The Origin of Species: The Making of a Theory
- Bozeman - Examples of Natural Selection
- Bozeman - Scientific Evidence for Evolution
- Bozeman - Evidence for Evolution II
Chapter 23: The Evolution of Populations
- Animation - Origins of Genetic Variation
- Animation - Causes of Evolutionary Change
- Figure Walkthrough - Hardy-Weinberg Equilibrium
- BioFlix - Natural Selection, Genetic Drift, and Gene Flow
- BioFlix - Allele Frequencies
- HHMI BioInteractive - Got Lactase? The Co-evolution of Genes and Culture
- HHMI BioInteractive - Selection for Tuskless Elephants
- HHMI BioInteractive - The Making of the Fittest: Natural Selection in Humans (Sickle-Cell Disease)
- Bozeman - Evolution Continues
- Bozeman - Population Variation
- Bozeman - Hardy-Weinberg Punnett Square
Chapter 24: The Origin of Species
- Animation - Speciation by Changes in Ploidy
- Animation - Overview of Macroevolution
- Video - Blue-footed Boobies Courtship Ritual
- Video - Albatross Courtship Ritual
- Video - Giraffe Courtship Ritual
- Video - Prezygotic Barriers to Mating in Galápagos Finches by Peter and Rosemary Grant
- Figure Walkthrough - Anole Lizards: An Example of Speciation
- Figure Walkthrough - One Mechanism for Allopolyploid Speciation in Plants
- HHMI BioInteractive - The Origin of Species: The Beak of the Finch
Chapter 25: The History of Life on Earth
- Animation - Overview of Macroevolution
- Animation - Allometric Growth
- Animation - The Geologic Record
- BBC Video - How Did Eyes Evolve?
- HHMI BioInteractive - The Making of the Fittest: Evolving Switches, Evolving Bodies (Stickleback)
- HHMI BioInteractive - Plate Tectonics
- HHMI BioInteractive - Animated Life: Pangea, Wegener, and Continental Drift
- HHMI BioInteractive - The Day the Mesozoic Died
- HHMI BioInteractive - The Origin of Flight: What Use Is Half a Wing?
- Bozeman - Essential Characteristics of Life Are Conserved
- Bozeman - Speciation and Extinction
- Bozeman - The Origin of Life - Scientific Evidence
Chapter 26: Phylogeny and the Tree of Life
- Animation - Classification Schemes
- Figure Walkthrough - Using Derived Characters to Infer Phylogeny
Chapter 27: Bacteria and Archaea
- Animation - Structure and Reproduction of Bacteria
- Video - Prokaryotic Flagella
- Figure Walkthrough - Conjugation and Recombination in E. coli
- BBC Video - A Future Without Antibiotics?
Chapter 28: Protists
- Animation - Life Cycle of a Malaria Parasite
- Animation - Alternation of Generations in a Protist
- Video - Ciliate Movement in Stentor
- HHMI BioInteractive - Seeing the Invisible: Van Leeuwenhoek's First Glimpses of the Microbial World
Chapter 29: Plant Diversity I: How Plants Colonized Land
Chapter 30: Plant Diversity II: The Evolution of Seed Plants
- Animation - Angiosperm Life Cycle
- Animation - Seed Development
- Animation - Fruit Structure and Seed Dispersal
- Figure Walkthrough - From Ovule to Seed in a Gymnosperm
- Figure Walkthrough - The Life Cycle of an Angiosperm
Chapter 31: Fungi
- Animation - Fungal Growth and Nutrition
- Animation - Life Cycle of a Mushroom
- Video - Phlyctochytrium Zoospore Release
Chapter 32: An Overview of Animal Diversity
- Video - Sea Urchin Time Lapse
- Video - Interview with Nicole King
Chapter 33: An Introduction to Invertebrates
- Video - Hydra Eating Daphnia
- Video - Clownfish and Sea Anemone
- Video - Earthworm Locomotion
- Video - Echinoderm Tube Feet
- HHMI BioInteractive - Coral Bleaching
Chapter 34: The Origin and Evolution of Vertebrates
- Video - Sea Horse Camouflage
- Video - Clownfish and Sea Anemone
- Video - Snake Ritual Wrestling
- Video - Agonistic Behavior in Wolves
- Video - Agonistic Behavior in a Chimp
- HHMI BioInteractive - Great Transitions: The Origin of Birds
- HHMI BioInteractive - Great Transitions: The Origin of Tetrapods
- HHMI BioInteractive - How to Find a Dinosaur
- HHMI BioInteractive - Great Transitions: The Origin of Humans
- HHMI BioInteractive - The Tool-Making Animal
Chapter 35: Plant Structure, Growth, and Development
- Animation - Primary and Secondary Growth
- Animation - Root Cross Sections
- Animation - Stem Cross Sections
- Animation - Secondary Growth
- Video - Root Growth in a Radish Seedling
- Figure Walkthrough - Secondary Growth of a Woody Stem
- BioFlix - Tour of a Plant Cell
Chapter 36: Resource Acquisition and Transport in Vascular Plants
- Animation - Transport of Xylem Sap
- Animation - Phloem Transport
- Figure Walkthrough - Transport of Water and Minerals from Root Hairs to the Xylem
- BioFlix - Water Transport in Plants
- BioFlix - Transpiration-Cohesion-Tension Mechanism
- BioFlix - Water Transport from Roots to Leaves
- BioFlix - Water Transport from Soil into Roots
- Bozeman - Plant Nutrition and Transport
Chapter 37: Soil and Plant Nutrition
- Animation - How Plants Obtain Minerals From Soil
- Figure Walkthrough - The Roles of Soil Bacteria in the Nitrogen Nutrition of Plants
Chapter 38: Angiosperm Reproduction and Biotechnology
- Animation - Angiosperm Life Cycle
- Animation - Embryo and Endosperm Development
- Animation - Seed Germination
- Animation - Sexual Reproduction in Angiosperms
- Animation - Seed Development
- Animation - Angiosperm Fertilization
- Animation - Embryo and Endosperm Development
- Animation - Flowering Plant Life Cycle
- Animation - Fruit Development
- Animation - Seed Germination
- Animation - Reproduction in Flowering Plants
- Figure Walkthrough - The Life Cycle of an Angiosperm
- HHMI BioInteractive - Popped Secret: The Mysterious Origin of Corn
Chapter 39: Plant Responses to Internal and External Signals
Chapter 40: Basic Principles of Animal Form and Function
- Animation - Connective Tissue
- Animation - Epithelial Tissue
- Animation - Overview of Animal Tissues
- Animation - Negative Feedback
- Animation - Positive Feedback
- Figure Walkthrough - The Thermostatic Function of the Hypothalamus in Human Thermoregulation
- BioFlix - Gas Exchange in the Human Body
- BioFlix - Homeostasis: Regulating Blood Sugar
- Bozeman - Positive and Negative Feedback Loops
- Bozeman - Response to External Environments
- Bozeman - Homeostatic Evolution
- Bozeman - Homeostatic Disruptions
Chapter 41: Animal Nutrition
- Animation - Digestive System Function
- Animation - Overview of the Human Digestive System
- Animation - Pancreatic Hormones Regulate Blood Glucose Level
- Video - Hydra Eating Daphnia
- Video - Feeding in the Lobster
- Figure Walkthrough - The Stomach and its Secretions
- BioFlix - Nutrient Transport across Membranes
- BioFlix - Homeostasis: Regulating Blood Sugar
- HHMI BioInteractive - The Fate of Fat
Chapter 42: Circulation and Gas Exchange
- Animation - Structure of the Human Heart
- Animation - The Human Heart and Circulation
- Animation - Gas Exchange in Fish Gills
- Animation - The Human Respiratory System
- Animation - Transport of Respiratory Gases
- Animation - Path of Blood Flow
- Figure Walkthrough - Cross-Sectional Area of Blood Vessels, Blood Flow Velocity, and Blood Pressure
- Figure Walkthrough - Structure and Function of Fish Gills
- BioFlix - Gas Exchange in the Human Body
- BioFlix - Mechanics of Breathing
- BBC Video - The Impact of Smoking
- Bozeman - Circulatory System
- Bozeman - Respiratory System
Chapter 43: The Immune System
- Animation - Overview of the Inflammatory Response
- Animation - Cell-Mediated Immunity
- Animation - Clonal Selection
- Animation - HIV Reproductive Cycle
- Video - Chemotaxis of a Neutrophil
- BioFlix - Innate Defenses: Dendritic Cells and Epitope Presentation
- BioFlix - Adaptive Defenses: B Cells and Humoral Immunity
- BioFlix - Adaptive Defenses: T Cells and Cellular Immunity
- BioFlix - Summary of Adaptive Immunity
- Bozeman - Plant and Animal Defense
Chapter 44: Osmoregulation and Excretion
- Animation - Kidney Structure
- Animation - Nephron Structure
- Animation - Control of Water Reabsorption
- Figure Walkthrough - How the Human Kidney Concentrates Urine: The Two-Solute Model
- BioFlix - Membrane Transport
Chapter 45: Hormones and the Endocrine System
- Animation - Negative Feedback
- Animation - Positive Feedback
- Animation - Steroid Hormone Pathway
- Animation - Binding of Hormones
- Animation - Endocrine System Anatomy
- Animation - Water-Soluble Hormone Pathway
- Animation - Hormonal Response to Stress
- BioFlix - Homeostasis: Regulating Blood Sugar
- BBC Video - Male, Female, or Intersex?
- Bozeman - Signal Transmission and Gene Expression
- Bozeman - Fight or Flight Response
Chapter 46: Animal Reproduction
- Animation - Human Spermatogenesis
- Animation - Reproductive System of the Human Female
- Animation - Reproductive System of the Human Male
- Animation - Reproductive Cycles of the Human Female
- Animation - Hormonal Control of the Testes
- Video - Ultrasound of a Fetus 1
- Video - Ultrasound of a Fetus 2
- Video - Flagellum Movement in Swimming Sperm
- Video - Flagellum of Mouse Sperm
- Bozeman - Reproductive System
Chapter 47: Animal Development
- Video - Calcium Release in a Fertilized Egg Cell
- Video - Sea Urchin Fertilization and Cleavage
- Video - Sea Urchin Gastrulation
- Video - Ultrasound of a Fetus 1
- Video - Ultrasound of a Fetus 2
- HHMI BioInteractive - Differentiation and the Fate of Cells
- HHMI BioInteractive - Human Embryonic Development
- Bozeman - Development - Timing and Coordination
Chapter 48: Neurons, Synapses, and Signaling
- Animation - Sodium-Potassium Pump
- Animation - Membrane Potentials
- Animation - Propagation of an Action Potential in Unmyelinated and Myelinated Axons
- Animation - Action Potentials
- BioFlix - Conduction of an Action Potential
- HHMI BioInteractive - Baldomero Olivera on the Deadly Conus geographus
- HHMI BioInteractive - Blockage of Motor Neuron Synapses by Cone Snail Toxins
Chapter 49: Nervous Systems
- BBC Video - Searching for a Cure for Alzheimer's
- HHMI BioInteractive - The Human Suprachiasmatic Nucleus
Chapter 50: Sensory and Motor Mechanisms
- Animation - Function of the Retina
- Animation - Near and Distance Vision
- Animation - Structure and Function of the Eye
- Animation - Myosin and Actin Interaction
- Video - Earthworm Locomotion
- Video - Echinoderm Tube Feet
- Figure Walkthrough - Response of a Photoreceptor Cell to Light
- BioFlix - Muscle Contraction
- BioFlix - From Muscle Cells to Movement
- BioFlix - Roles of Calcium and ATP in Muscle Contraction
- BioFlix - Sliding-Filament Model of Muscle Contraction
- BBC Video - How Did Eyes Evolve?
- HHMI BioInteractive - Genes as Medicine
- Bozeman - Integumentary System
Chapter 51: Animal Behavior
- Animation - Digger Wasps and Landmarks
- Video - Albatross Courtship Ritual
- Video - Blue-footed Boobies Courtship Ritual
- Video - Giraffe Courtship Ritual
- Video - Agonistic Behavior in Wolves
- Video - Agonistic Behavior in a Chimp
- Video - Snake Ritual Wrestling
- HHMI BioInteractive - Studying Elephant Communication
- HHMI BioInteractive - How Lizards Find Their Way Home
- Bozeman - Behavior and Natural Selection
- Bozeman - Information Exchange
Chapter 52: An Introduction to Ecology and the Biosphere
- Animation - Terrestrial Biomes
- Video - Clownfish and Sea Anemone
- Figure Walkthrough - Seasonal Variation in Sunlight Intensity
Chapter 53: Population Ecology
- Animation - Investigating the Survivorship Curve of Oysters
- Animation - Techniques for Estimating Population Density and Size
- Animation - Analyzing Age-Structure Pyramids
- Video - Albatross Courtship Ritual
- Figure Walkthrough - Life Table for Belding's Ground Squirrels
- BioFlix - Population Ecology
- BioFlix - Exponential Growth
- BioFlix - Density Dependence
- Bozeman - Biotic and Abiotic Factors
- Bozeman - Exponential Growth
Chapter 54: Community Ecology
- Animation - Exploring Island Biogeography
- Video - Sea Horse Camouflage
- Figure Walkthrough - An Antarctic Marine Food Web
- HHMI BioInteractive - Moth Mimicry: Using Ultrasound to Avoid Bats
- HHMI BioInteractive - Riverine Food Webs: How Flow Rates Affect Biomass
- HHMI BioInteractive - Some Animals Are More Equal Than Others: Keystone Species and Trophic Cascades
- HHMI BioInteractive - Trophic Cascades in Salt Marsh Ecosystems
- Bozeman - Cooperative Interactions
- Bozeman - Aposematic Coloration
- Bozeman - Ecological Succession
Chapter 55: Ecosystems and Restoration Ecology
- Animation - Energy Flow and Chemical Cycling
- Animation - The Nitrogen Cycle
- Figure Walkthrough - An Overview of Energy and Nutrient Dynamics in an Ecosystem
- BioFlix - Population Ecology
- HHMI BioInteractive - Response of Corals to Ocean Warming and Efforts to Restore Damaged Reefs
Chapter 56: Conservation Biology and Global Change
- Animation - The Global Carbon Cycle and the Greenhouse Effect
- Animation - Water Pollution from Nitrates
- Figure Walkthrough - The Greenhouse Effect
- HHMI BioInteractive - Surveying Gorongosa's Biodiversity
- HHMI BioInteractive - Seed Dispersal and Forest Fragmentation
- HHMI BioInteractive - Greenhouse Effect
AP Biology Labs
- Bozeman - AP Biology Lab 1 - Diffusion and Osmosis
- Bozeman - Osmosis Lab Walkthrough
- Bozeman - AP Biology Lab 2 - Enzyme Catalysis
- Bozeman - AP Biology Lab 3 - Mitosis and Meiosis
- Bozeman - AP Biology Lab 4 - Plant Pigments & Photosynthesis
- Bozeman - Photoosynthesis Lab Walkthrough
- Bozeman - AP Biology Lab 5 - Cellular Respiration
- Bozeman - Cellular Respiration Lab Walkthrough
- Bozeman - AP Biology Lab 6 - Molecular Biology
- Bozeman - AP Biology Lab 7 - Genetics of Drosophila
- Bozeman - AP Biology Lab 8 - Population Genetics & Evolution
- Bozeman - Comparing DNA Sequences
- Bozeman - AP Biology Lab 9 - Transpiration
- Bozeman - AP Biology Lab 10 - Physiology of the Circulatory System
- Bozeman - AP Biology Lab 11 - Animal Behavior
- Bozeman - AP Biology Lab 12 - Dissolved Oxygen