AP Biology

Six interactive lessons and a unit assessment, beginning with scientific method and experimental design before water, elements, macromolecules, carbohydrates, lipids, nucleic acids, and proteins.

Seven interactive lessons and a unit assessment covering cell structures, size, membranes, transport, water balance, gradients, and compartmentalization.

Six interactive lessons, three digital labs, and a unit assessment covering enzymes, energy coupling, photosynthesis, respiration, chemiosmosis, and experimental analysis.

Six interactive lessons, three digital investigations, and a unit assessment covering cell communication, signal transduction, feedback, mitosis, checkpoints, and cancer.

Four interactive lessons, four digital investigations, and a unit assessment covering meiosis, genetic diversity, Mendelian probability, linkage, pedigrees, chi-square, and environmental effects.

Six interactive lessons, five digital investigations, and a unit assessment covering DNA, gene expression, regulation, mutation, variation, and biotechnology.

Seven interactive lessons, six digital investigations, and a unit assessment covering selection, population genetics, evidence, phylogeny, speciation, diversity, and origins of life.

Six interactive lessons, six digital investigations, and a unit assessment covering responses, energy, populations, communities, biodiversity, and ecosystem disruptions.

Open the separate AP Biology Exam Review page for course review and exam practice.

Exam format and timing, pacing, the formula sheet, and how to use AP Classroom videos, progress checks and reports.

Command words, graphing and calculation checklists, experimental design, and common point-losing mistakes for free-response questions.

Step-by-step explanations, worked examples, and practice with solutions for AP formula-sheet calculations and related course math: metric conversions, statistics and error bars, chi-square, surface area-to-volume, water potential, probability, map distance, Hardy–Weinberg, population growth, diversity, rates, and energy transfer.

Build a timed AP-style paper from the units you choose, with optional free-response questions and a code to rebuild it. Each unit page also has a filterable Question Bank.