AP Biology practice tests by unit
- Unit 1 practice test: Chemistry of Life
- Unit 2 practice test: Cell Structure and Function
- Unit 3 practice test: Cellular Energetics
- Unit 4 practice test: Cell Communication and Cell Cycle
- Unit 5 practice test: Heredity
- Unit 6 practice test: Gene Expression and Regulation
- Unit 7 practice test: Natural Selection
- Unit 8 practice test: Ecology