🧬Free

AP Biology Essentials

Master the AP Biology curriculum -- from the chemistry of life and cell structure to genetics, evolution, and ecology. Aligned with College Board standards, with analogies and real experiments that make complex biology accessible.

8 modules 32 lessons ~8h AI voice coach

Course Outline

1

Chemistry of Life

4 lessons

Explore the chemical foundations of living systems — water's unique properties, the four macromolecules, and how enzymes speed up life's reactions. Reference: Campbell Biology (Urry et al., 12th ed., Pearson, 2021), Chapters 2-5.

Water: The Molecule That Makes Life Possible
The Four Macromolecules: Building Blocks of Life
Enzymes: The Speed Controllers of Life
Checkpoint: Chemistry of Life
2

Cell Structure

4 lessons

Understand the differences between prokaryotic and eukaryotic cells, explore key organelles, and learn how the cell membrane controls what enters and exits. Reference: Campbell Biology (Urry et al., 12th ed., Pearson, 2021), Chapters 6-7.

Prokaryotic vs. Eukaryotic Cells
Organelles: The Cell's Specialized Workers
The Cell Membrane: Gatekeeper of the Cell
Checkpoint: Cell Structure
3

Cellular Energetics

4 lessons

Understand how cells capture and use energy — from photosynthesis to cellular respiration to the central role of ATP. Reference: Campbell Biology (Urry et al., 12th ed., Pearson, 2021), Chapters 8-10.

Photosynthesis: Capturing Sunlight
Cellular Respiration: Unlocking Energy from Food
ATP: The Energy Currency of Cells
Checkpoint: Cellular Energetics
4

Cell Communication

4 lessons

Learn how cells send, receive, and respond to chemical signals — from signal transduction pathways to hormones and feedback loops. Reference: Campbell Biology (Urry et al., 12th ed., Pearson, 2021), Chapter 11.

Signal Transduction: How Cells Talk to Each Other
Hormones: Long-Distance Chemical Messengers
Feedback Loops: How the Body Stays Balanced
Checkpoint: Cell Communication
5

Heredity & Genetics

4 lessons

Discover how traits are passed from parents to offspring — Mendel's laws, DNA replication, and how to predict inheritance with Punnett squares. Reference: Campbell Biology (Urry et al., 12th ed., Pearson, 2021), Chapters 13-15.

Mendel and the Laws of Inheritance
DNA Replication: Copying the Blueprint
Punnett Squares: Predicting Inheritance
Checkpoint: Heredity & Genetics
6

Gene Expression

4 lessons

Understand how genes are read and turned into proteins — transcription, translation, mutations, and the emerging field of epigenetics. Reference: Campbell Biology (Urry et al., 12th ed., Pearson, 2021), Chapters 17-18.

Transcription: From DNA to RNA
Translation: From RNA to Protein
Mutations and Epigenetics: When Genes Change
Checkpoint: Gene Expression
7

Natural Selection & Evolution

4 lessons

Explore Darwin's theory, the evidence for evolution, mechanisms of speciation, and how Hardy-Weinberg equilibrium describes stable populations. Reference: Campbell Biology (Urry et al., 12th ed., Pearson, 2021), Chapters 22-25.

Darwin and Natural Selection
Evidence for Evolution
Speciation and Hardy-Weinberg Equilibrium
Checkpoint: Natural Selection & Evolution
8

Ecology

4 lessons

Explore how organisms interact with each other and their environment — populations, communities, ecosystems, and the challenges facing global biodiversity. Reference: Campbell Biology (Urry et al., 12th ed., Pearson, 2021), Chapters 52-56.

Population Ecology: Growth, Limits, and Carrying Capacity
Communities and Ecosystems: How Life Connects
Biodiversity: Why It Matters and What Threatens It
Checkpoint: Ecology