This is the place to go if you do not understand a concept or need to review. Each link is to a specific video that will help you on the topic.
Introduction to Science
-Significant digits - Review
-Metric System and Conversion - Review 1 and Review 2
-Scientific Method - Review Playlist (9 videos)
-Theory vs Law vs. Hypothesis - Review 1 and Review 2
-Chi Square Calculations - Review
-Standard Deviation Calculations - Review
-Standard Error of the Mean SEM - Review
Introduction to Chemistry
-The elements and properties - Review 1 and Review 2 and Review 3
-Types of bonds -
----Ionic Bonding - Review
----Covalent Bonding - Review
----Comparing Covalent and Ionic Bonds - Review
----Hydrogen Bonding - Review
-Oxidation/Reduction Reactions - Review 1 and Review 2
-Carbon and Life - Review 1 and Review 2
-Organic Chemistry - Review 1 and Review 2
-Functional Groups - Review
-Naming Organic Compounds - Review -Properties of water - Review
Evolution
-Origin of Life - Review
-Evolution Overview - Review
-Natural Selection - Review
-Lamarck vs. Darwin - Review
-Genetic Drift - Review
-Genetic Drift, Bottleneck effect, and Founder Effect - Review
-Stabilizing Disruptive, and Directional Selection - Review
-Hardy-Weinberg Equilibrium - Review
-Hardy-Weinberg Lab / Population Genetics - Review
-Evidence for Evolution - Review
-Heterozygous Advantage - Review
-Comparative Embryology - Review
-Homologous Structures vs. Analogous Structures - Review 1 and Review 2
-Coevolution - Review 1 and Review 2
-Speciation - Review
-Peppered moth - Review
-Bacterial Resistance - Review
-Phylogenetic Trees - Review
-Fossil Dating Methods - Review
-Speciation - Review 1 and Review 2
-History of Life on Earth - Review
-Natural Selection vs. Artificial Selection - Review
-Epigenetics - Review 1 and Review 2
-Kin Selection - Review
Macromolecules
-Introduction - Review 1 and Review 2
-Dehydration Synthesis and Hydrolysis - Review 1 and Review 2
-Alpha vs. Beta Glucose - Review
-Biogeochemical Cycles - Review
-Protein Folding - Review
Enzymes
-Introduction - Review
-Feedback inhibition - Review
-Gibbs Free Energy - Review
-Denaturation and Factors that Affect Enzymes - Review 1 and Review 2
-Lock and Key Model vs. induced fit - Review
Cells / Organelles
-Cell Organelles - Review 1 and Review 2
-Hyper/Hypo/Isotonic Solutions - Review
-Water potential - Review
-Active vs. Passive Transport Across the Cell Membrane - Review
-Cell Size (Surface Area to Volume) - Review
-Cell Size Lab - Review
-Structure of the cell membrane - Review
-Endosymbiotic Theory - Review
Cell Communication
-Cell Communication Overview - Review 1 and Review 2
-Signal Transduction Pathways - Review
Cellular Respiration / Photosynthesis
-Overview - Review
-Oxidation/Reduction in Cellular Respiration - Review
-Glycolysis in Detail - Review
-Krebs Cycle in Detail - Review
-Substrate Level vs. Oxidative Phosphorylation - Review
-Electron Transport Chain (Oxidative Phosphorylation) in Detail - Review
-Aerobic vs. Anaerobic - Review
-ATP Accounting - Review
-Rate of Respiration Lab - Review
Photosynthesis
-Overview - Review
-Light Reactions and Photophosphorylation - Review
-Dark Reactions and Carbon Fixation - Review
Reproduction
-Sexual Reproduction Overview - Review
-Cell Cycle - Review
-Cell Cycle Regulation and Cancer - Review
-Mitosis - Review
-Meiosis - Review
-Homologous Chromosomes vs. Sister and Other Confusing Vocabulary - Review
-Crossing Over - Review
-Gene Mapping 1 - Review
-Gene Mapping 2 - Review
-Gene Mapping 3 - Review
-Nondisjunction Mutation - Review
Genetics
-Basic Punnett Square Review - Review
-Mendel's Laws - Review or Review
-Dihybrid cross - Review
-Determining number of possible gametes - Review
-Fork Line Method - Review
-Sex-linked Traits - Review
-Pedigree Charts - Review
-Karyotypes - Review
-Codominance and Incomplete dominance - Review
-Multiple Alleles (Blood typing) - Review
DNA
-Basic Structure - Review
-Anti-Parallel - Review or Review (More detailed)
-DNA Replication - Review or Review
-Central Dogma - Review
-mRNA processing - Review
-Alternate splicing - Review
-Gene regulation - Review
-Plasmids and Recombinant Technology - Review
Virology
-Are viruses Alive? - Review
-Virus Structure - Review
-Antigenic - Review
-Prions - Review
Immune System
-Introduction - Review
-Innate Immune System - Review
-Specific Immunity - Review
-MHC I and MHC II - Review
-B Cells, CD4 T-Cells and CD 8 T-Cells - Review
-Antibody Gene Recombination - Review
-Lymphatic System - Review
-Autoimmune Disease - Review or Review
-Vaccines and Heard Immunity - Review
-HIV - Review
Classification/Phylogeny
-Phylogeny - Review
-Bacteria - Review
-Bacteria, Archaea, and Protista - Review
-Animal Development - Review
-Animal Behavior - Review
-Counter-current Gas Exchange in Fish - Review
-Simpson Diversity Index - Review
Plant Biology
-Plant Nutrition and Transport - Review
-Plant Classification - Review
-Plant Structure - Review
-CAM, C3, and C4 Plants - Review
-Lab 9 - Transpiration
-Floating Disk Lab - Review
Ecology
-Altruism and Kin Selection - Review
-Ecosystems - Review
-Communities - Review
-Biotic and Abiotic Factors - Review
-Biodiversity - Review
-K vs. r selection - Review
-Exponential vs. Logistical Growth - Review
-Exponential Growth w/ math - Review
-Logistical Growth w/ math - Review
-Gross and Net Primary Productivity - Review
-Keystone Species and Community Structure - Review and Review
-Ecological Succession - Review
Other
-CRISPR - Listen
-CRISPR Part 2 (Update) - Listen
AP Biology Labs
Summary/Overview of the Labs:
Overview of the Labs - Part 1 - Review
Overview of the Labs - Part 2 - Review
Each Lab in Detail:
Lab 1: Diffusion and Osmosis - Review
Lab 2: Enzymes - Review
Lab 3: Mitosis and Meiosis - Review
Lab 4: Plant Pigment and Photosynthesis - Review
Lab 5: Cellular Respiration - Review
Lab 6: Molecular Biology - Review
Lab 7: Genetics - Review
Lab 8: Evolution - Review
Lab 9: Transpiration - Review
Lab 10: Circulatory System - Review
Lab 11: Animal Behavior - Review
Lab 12: Dissolved Oxygen - Review
BLAST Lab - Review