← Science
Biology
No static diagrams standing in for things that actually move. Every concept gets an interactive simulation you can manipulate yourself — the 8 units below match College Board’s official AP Biology Course and Exam Description.
The 8 units
Unit 1: Chemistry of LifeLessons ready
8–11%
8–11%
Unit 2: Cell Structure and FunctionLessons ready
10–13%
10–13%
Unit 3: Cellular EnergeticsLessons ready
12–16%
12–16%
Unit 4: Cell Communication and Cell CycleComing soon
10–15%
10–15%
Unit 5: HeredityLessons ready
8–11%
8–11%
Unit 6: Gene Expression and RegulationComing soon
12–16%
12–16%
Unit 7: Natural SelectionLessons ready
13–20%
13–20%
Unit 8: EcologyLessons ready
10–15%
10–15%