AP®︎/College Biology
Learn AP Biology using videos, articles, and AP-aligned multiple choice question practice. Review the fundamentals of biochemistry, cell biology, genetics, evolution, and ecology, and develop scientific thinking skills as you explore the study of life.
9 units208 videos29 hours
Learn it live with a class on Puzzicle · Teachers: use it with your class
Unit 1: Chemistry of life
Structure of water and hydrogen bonding
Elements of life
Introduction to macromolecules
Carbohydrates
Lipids
Nucleic acids
Unit 2: Cells
Cell structure and function
Cell size
Plasma membrane
Membrane permeability
Membrane transport
Facilitated diffusion
Tonicity and osmoregulation
Mechanisms of transport
Unit 3: Cellular energetics
Enzymes
Environmental impacts on enzyme function
Cellular energy
Photosynthesis
Unit 4: Cell communication and cell cycle
Cell communication
Signal transduction pathways
Membrane receptors ✓ Check-ins7:59
G-protein coupled receptors ✓ Check-ins12:48
Cellular mechanism of hormone action ✓ Check-ins8:23
Example of a signal transduction pathway ✓ Check-ins6:35
Cell signaling in yeast reproduction ✓ Check-ins8:02
Activation and inhibition of signal transduction pathways ✓ Check-ins5:56
Feedback
Regulation of cell cycle
Unit 5: Heredity
Meiosis and genetic diversity
Mendelian genetics
Non-Mendelian genetics
Environmental effects on phenotype
Unit 6: Gene expression and regulation
DNA and RNA structure
Replication
Transcription and RNA processing
Translation
Regulation of gene expression
Gene expression and cell specialization
Mutations
Unit 7: Natural selection
Natural selection
Artificial selection
Population genetics
Hardy-Weinberg equilibrium
Evidence of evolution
Common ancestry and continuing evolution
Phylogeny
Speciation
Variations in populations
Unit 8: Ecology
Responses to the environment
Energy flow through ecosystems
Biogeochemical cycles
Population ecology
Effect of density on populations
Community ecology and biodiversity
Interactions between populations ✓ Check-ins8:12
Predator-prey cycles ✓ Check-ins5:09
Tropical rainforest diversity ✓ Check-ins4:04
Population diversity and resilience ✓ Check-ins4:29
New localities lead to new biodiversity ✓ Check-ins10:30
Simpson's index of diversity ✓ Check-ins5:43
Ecosystems and ecological networks ✓ Check-ins8:56
Disruptions in ecosystems
Mutation as a source of variation ✓ Check-ins6:06
Introduced species and biodiversity ✓ Check-ins9:56
Human activities that threaten biodiversity ✓ Check-ins12:51
Eutrophication and dead zones ✓ Check-ins6:36
How does climate change affect biodiversity? ✓ Check-ins12:07
Biodiversity and extinction, then and now ✓ Check-ins12:22
How did all dinosaurs except birds go extinct? ✓ Check-ins1:55
Were dinosaurs undergoing long-term decline before mass extinction? ✓ Check-ins2:44
Unit 9: Explore biology through simulations
Introduction to simulation-based exercises
Learn this with a class
With a class on Puzzicle this course runs as a timetable of live study parties: your batch watches together and answers the check-ins, sometimes with a teacher leading.
Course content © Khan Academy, used under CC BY-NC-SA. See this course on Khan Academy.