Master AP Biology from the chemistry of life through ecology. Flashcards, cheat sheets, essential terms, practice questions, and visual reviews for all 8 units — all completely free.
Each unit has 6 study resources — flashcards, cheat sheet, essential terms, practice questions, visual review, and FRQ practice.
AP Biology is a college-level introductory biology course that explores life from the molecular level up through ecosystems. The course builds from the chemistry that makes life possible, through how cells work and divide, to how traits get passed from one generation to the next, how genes are expressed and regulated, how populations evolve, and how organisms interact within ecosystems.
This page covers all 8 units — Chemistry of Life, Cell Structure & Function, Cellular Energetics, Cell Communication & Cell Cycle, Heredity, Gene Expression & Regulation, Natural Selection, and Ecology.
Every page on this site is aligned to the College Board's official AP Biology Course and Exam Description and completely free. Use what works for your study style — flashcards for active recall, the cheat sheet for a one-page overview, or practice questions to test yourself before the exam.
Every unit has the same 6 study resources, designed for different learning styles.