Videos

The "flipped classroom" is an important part of the AP Biology class

at Ridgefield Memorial High School.

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AP Biology Videos

Chapter 1: Evolution, the Themes of Biology, and Scientific Inquiry

- Animation - Heritable Information:  DNA

- Animation - Signs of Life

- Animation - Introduction to Experimental Design

- Animation - Negative Feedback

- Animation - Positive Feedback

- Video - Sea Horse Camouflage

- Video - Galápagos Biodiversity by Peter and Rosemary Grant

- Figure Walkthrough - Gene Expression:  Cells Use Information Encoded in a Gene to Synthesize a Functional Protein

- HHMI BioInteractive - The Making of The Fittest:  Natural Selection and Adaptation (Rock Pocket Mouse)

- HHMI BioInteractive - The Origin of Species:  The Beak of the Finch

- Bozeman - Biology

- Bozeman - Environmental Matter Exchange

- Bozeman - Three Domains of Life

- Bozeman - Hierarchy of Life


Chapter 2: The Chemical Context of Life

- Animation - Atomic Number and Atomic Mass

- Animation - Electron Distribution Diagrams

- Animation - Covalent Bonds

- Animation - Formation of Ions and Ionic Bonds

- Animation - Hydrogen 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 - Isomers

- Animation - Functional Groups


Chapter 5: The Structure and Function of Large Biological Molecules

- Animation - Making and Breaking Polymers

- Animation - Carbohydrates

- Animation - Monosaccharides

- Animation - Starch, Cellulose, and Glycogen Structures

- Animation - Synthesis of Sucrose

- Animation - Lipids

- Animation - Space-Filling Model of a Phospholipid

- Animation - Protein Functions

- Animation - Protein Structure

- Animation - Proteins

- Animation - Nucleic Acid Structure

- Figure Walkthrough - The Structure of a Phospholipid

- BioFlix - Gene Expression

- 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

- Animation - Cell Junctions

- Video - Chlamydomonas

- Video - Turgid Elodea

- Video - Amoeba Pseudopodia

- Video - Cytoplasmic Streaming

- Video - Flagellum Beating with ATP

- Video - Flagellum Movement in Swimming Sperm

- Video - Paramecium Cilia

- Figure Walkthrough - Geometric Relationships Between Surface Area and Volume

- BioFlix - Tour of a Plant Cell

- BioFlix - Tour of an Animal Cell

- BioFlix - Membranes

- BioFlix - Nucleus and Ribosomes

- BioFlix - Central Vacuole

- BioFlix - Endomembrane System

- BioFlix - Chloroplasts and Mitochondria

- BioFlix - Mitochondria

- BioFlix - Actin and Myosin in Muscle Contraction

- BioFlix - Cytoskeleton

- 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 - Diffusion

- Animation - Facilitated Diffusion

- Animation - Osmosis and Water Balance in Cells

- Animation - Active Transport

- Animation - Exocytosis and Endocytosis

- Animation - Sodium-Potassium Pump

- Video - Turgid Elodea

- Video - Paramecium Vacuole

- Video - Plasmolysis in Elodea

- Figure Walkthrough - Osmosis

- BioFlix - Membrane Transport

- BioFlix - Passive Transport

- BioFlix - Active Transport

- BioFlix - Exocytosis and Endocytosis

- Bozeman - Cell Membranes

- Bozeman - Transport Across Cell Membranes

- Bozeman - Water Potential


Chapter 8: An Introduction to Metabolism

- Animation - Energy Transformations

- Animation - Exergonic and Endergonic Reactions

- Animation - Energy Coupling

- 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 - Gibbs Free Energy

- Bozeman - Enzymes

- 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 - Redox Reactions

- Animation - Glycolysis

- 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

- Animation - Fermentation

- Figure Walkthrough - Free-Energy Change During Electron Transport

- BioFlix - Cellular Respiration

- BioFlix - Introduction to Cellular Respiration

- BioFlix - Glycolysis

- BioFlix - Acetyl CoA

- BioFlix - The Citric Acid Cycle

- BioFlix - ATP Synthase

- 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 - Photosynthesis

- BioFlix - The Flow of Carbon Atoms in Producers, Consumers, and Decomposers

- BioFlix - The Light Reactions

- BioFlix - The Calvin Cycle

- HHMI BioInteractive - Photosynthesis

- Bozeman - Photosynthesis and Respiration


Chapter 11: Cell Communication

- Animation - Overview of Cell Signaling

- Animation - Acetylcholine Receptor

- Animation - Reception

- Animation - Steroid Hormone Pathway

- Animation - Signal Transduction Pathways

- Animation - Cytoplasmic Response:  Glycogen Breakdown

- Animation - Nuclear Response:  Activating a Gene

- Animation - Apoptosis

- 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 - Cytokinesis

- Animation - Microtubule Depolymerization

- Animation - Mitosis

- Animation - The Cell Cycle

- 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 - Mitosis

- 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 - Meiosis

- 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 - Hydra Budding

- Video - Meiosis I in Sperm Production

- Figure Walkthrough - A Comparison of Mitosis and Meiosis

- BioFlix - Meiosis

- BioFlix - Chromosomes

- 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)

- Bozeman - Blood Types


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

- Bozeman - Advanced Genetics

- Bozeman - X Inactivation


Chapter 16: The Molecular Basis of Inheritance

- Animation - Bacteriophage Reproduction

- Animation - DNA Stick Model

- 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

- Animation - DNA Packing

- Figure Walkthrough - Addition of a Nucleotide to a DNA Strand

- BioFlix - DNA Replication

- 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 - A Spliceosome

- 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 - Ribosomes

- Animation - Termination of Translation

- Animation - Transfer RNA

- Animation - Mutation Types

- Video - GFP Transgenic Mice

- Video - Cotranslational Translocation

- Figure Walkthrough - Types of Small-Scale Mutations That Affect mRNA Sequence

- BioFlix - Protein Synthesis

- BioFlix - Transcription

- BioFlix - RNA Processing

- BioFlix - Protein Processing

- BioFlix - Translation

- 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 - Gene Regulation

- Bozeman - Genotype Expression

- Bozeman - Cellular Specialization

- Bozeman - Epigenetics

- Bozeman - The Operon

- 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

- Bozeman - Viral Replication


Chapter 20: DNA Tools and Biotechnology

- Animation - Copying DNA Through PCR

- Animation - Creating Recombinant DNA

- Animation - Gel Electrophoresis of DNA

- Animation - Recombinant 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 - Grand Canyon

- Video - Sea Horse Camouflage

- Video - Sea Lion

- Video - Marine Iguana

- Video - Tortoise

- 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 - Natural Selection

- 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 - Genetic Drift

- 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

- Bozeman - Speciation


Chapter 25: The History of Life on Earth

- Animation - Overview of Macroevolution

- Animation - Allometric Growth

- Animation - The Geologic Record

- Video - Lava Flow

- Video - Volcanic Eruption

- Video - Tubeworms

- Figure Walkthrough - A Hypothesis for the Origin of Mitochondria and Plastids Through Serial Endosymbiosis

- 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 - Abiogenesis

- 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

- Bozeman - Phylogenetics

- Bozeman - Cladograms


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 - Amoeba Pseudopodium

- Video - Volvox

- Video - Euglena

- Video - Ciliate Movement in Stentor

- Video - Dinoflagellate

- Video - Diatoms Moving

- Video - Various Diatoms

- Video - Paramecium

- HHMI BioInteractive - Seeing the Invisible:  Van Leeuwenhoek's First Glimpses of the Microbial World


Chapter 29: Plant Diversity I:  How Plants Colonized Land

- Animation - Moss Life Cycle

- Animation - Fern Life Cycle


Chapter 30: Plant Diversity II:  The Evolution of Seed Plants

- Animation - Pine Life Cycle

- Animation - Angiosperm Life Cycle

- Animation - Seed Development

- Animation - Fruit Structure and Seed Dispersal

- Video - Bee Pollinating

- 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

- Bozeman - Animals


Chapter 33: An Introduction to Invertebrates

- Video - Hydra Eating Daphnia

- Video - Hydra Budding

- Video - Clownfish and Sea Anemone

- Video - Jelly Swimming

- Video - Thimble Jellies

- Video - C. elegans Crawling

- Video - C. elegans Embryo

- Video - Earthworm Locomotion

- Video - Nudibranchs

- Video - Rotifer

- Video - Butterfly Emerging

- Video - Echinoderm Tube Feet

- HHMI BioInteractive - Coral Bleaching

- Bozeman - Animals


Chapter 34: The Origin and Evolution of Vertebrates

- Video - Sea Horse Camouflage

- Video - Clownfish and Sea Anemone

- Video - Flapping Geese

- Video - Snake Ritual Wrestling

- Video - Soaring Hawk

- Video - Swans Take Flight

- Video - Bat Licking

- Video - Shark Eating Seal

- Video - Sea Lion

- Video - Agonistic Behavior in Wolves

- Video - Agonistic Behavior in a Chimp

- Video - Chimp Cracking Nut

- Video - Gibbon Brachiating

- 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 - Leaf Anatomy

- 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

- Bozeman - Plants

- Bozeman - Plant Structure


Chapter 36: Resource Acquisition and Transport in Vascular Plants

- Animation - Transport of Xylem Sap

- Animation - Phloem Transport

- Video - Plasmolysis

- Video - Turgid Elodea

- Figure Walkthrough - Transport of Water and Minerals from Root Hairs to the Xylem

- BioFlix - Water Transport in Plants

- BioFlix - Transpiration

- BioFlix - Transpiration-Cohesion-Tension Mechanism

- BioFlix - Water Transport from Roots to Leaves

- BioFlix - Water Transport from Soil into Roots

- Bozeman - Plant Nutrition and Transport

- Bozeman - Water Potential


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

- Video - Bat Pollinating

- Video - Flower Time Lapse

- Video - Bee Colony Decline

- 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

- Animation - Leaf Abscission

- Video - Phototropism

- Video - Gravitropism

- Video - Mimosa Leaves

- Bozeman - Plant Control


Chapter 40: Basic Principles of Animal Form and Function

- Animation - Connective Tissue

- Animation - Epithelial Tissue

- Animation - Muscle Tissue

- Animation - Nervous 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 - Animals

- Bozeman - Positive and Negative Feedback Loops

- Bozeman - Response to External Environments

- Bozeman - Homeostatic Evolution

- Bozeman - Homeostatic Disruptions

- Bozeman - Organ Systems


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

- BioFlix - Diabetes

- HHMI BioInteractive - The Fate of Fat

- Bozeman - Digestive System


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

- Video - Leukocytes Rolling

- 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

- Bozeman - Homeostasis Hugs


Chapter 43: The Immune System

- Animation - Overview of the Inflammatory Response

- Animation - Role of B Cells

- Animation - Cell-Mediated Immunity

- Animation - Antibodies

- Animation - Clonal Selection

- Animation - HIV Reproductive Cycle

- Video - Chemotaxis of a Neutrophil

- Video - T Cell Receptors

- 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

- Bozeman - Immune System


Chapter 44: Osmoregulation and Excretion

- Animation - Kidney Structure

- Animation - Nephron Structure

- Animation - Control of Water Reabsorption

- Animation - Effect of ADH

- Figure Walkthrough - How the Human Kidney Concentrates Urine:  The Two-Solute Model

- BioFlix - Membrane Transport

- Bozeman - Osmoregulation

- Bozeman - Homeostasis Hugs


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

- BioFlix - Diabetes

- BBC Video - Male, Female, or Intersex?

- Bozeman - Homeostatic Loops

- Bozeman - Signal Transmission and Gene Expression

- Bozeman - Fight or Flight Response

- Bozeman - Endocrine System


Chapter 46:  Animal Reproduction

- Animation - Human Oogenesis

- 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 - Cortical Granules

- Video - Calcium Release in a Fertilized Egg Cell

- Video - Sea Urchin Fertilization and Cleavage

- Video - Frog Development

- 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

- Video - Dendrites

- BioFlix - How Neurons Work

- BioFlix - How Synapses Work

- BioFlix - Resting Potential

- BioFlix - Action Potential

- 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

- Bozeman - Nervous System


Chapter 49: Nervous Systems

- BBC Video - Searching for a Cure for Alzheimer's

- HHMI BioInteractive - The Human Suprachiasmatic Nucleus

- Bozeman - The Brain


Chapter 50: Sensory and Motor Mechanisms

- Animation - Detecting Pitch

- Animation - The Human Ear

- Animation - Function of the Retina

- Animation - Near and Distance Vision

- Animation - Photoreception

- Animation - Structure and Function of the Eye

- Animation - Myosin and Actin Interaction

- Video - Cardiac Muscle

- Video - Soaring Hawk

- Video - Earthworm Locomotion

- Video - Echinoderm Tube Feet

- Video - Jelly Swimming

- Video - Thimble Jellies

- Figure Walkthrough - Response of a Photoreceptor Cell to Light

- BioFlix - Muscle Contraction

- BioFlix - From Muscle Cells to Movement

- BioFlix - Muscle Structure

- 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

- Bozeman - Skeletal System

- Bozeman - Muscular System

- Bozeman - Sensory 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 - Bee Pollinating

- Video - Chimp Cracking Nut

- Video - Ducklings

- 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 - Animal Behavior

- Bozeman - Behavior and Natural Selection

- Bozeman - Information Exchange


Chapter 52: An Introduction to Ecology and the Biosphere

- Animation - Terrestrial Biomes

- Video - Tubeworms

- Video - Clownfish and Sea Anemone

- Video - Coral Reef

- 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

- Video - Flapping Geese

- Figure Walkthrough - Life Table for Belding's Ground Squirrels

- BioFlix - Population Ecology

- BioFlix - Exponential Growth

- BioFlix - Logistic Growth

- BioFlix - Density Dependence

- BioFlix - Predator-Prey

- Bozeman - Biotic and Abiotic Factors

- Bozeman - Populations

- Bozeman - Exponential Growth

- Bozeman - r and K Selection


Chapter 54: Community Ecology

- Animation - Exploring Island Biogeography

- Video - Sea Horse Camouflage

- Video - Shark Eating Seal

- 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 - Communities

- Bozeman - Cooperative Interactions

- Bozeman - Biodiversity

- Bozeman - Aposematic Coloration

- Bozeman - Niche

- 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

- BioFlix - The Carbon Cycle

- HHMI BioInteractive - Response of Corals to Ocean Warming and Efforts to Restore Damaged Reefs

- Bozeman - Ecosystems


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

- Bozeman - Ecosystem Change


AP Biology Labs

- Bozeman - Chi-Squared Test

- 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

- Bozeman - AP Biology Labs - Part 1

- Bozeman - AP Biology Labs - Part 2