Unit 1
Chemistry of Life
Water, carbon, macromolecules, and the chemistry concepts that show up again and again.
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AP Biology notes, videos, diagrams, and study resources designed for curious students.
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Unit 2
Cell Structure
Organelles, membranes, transport, and the cell details that make big systems work.
Unit 3
Genetics Review
Meiosis, inheritance patterns, DNA, gene expression, and common test connections.
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Video
Osmosis vs. Diffusion
A quick visual comparison with examples students actually see on tests.
Video
Mitosis Phase Walkthrough
A calm walkthrough of each phase, from interphase through cytokinesis.
Video
Enzymes & Activation Energy
Active sites, substrates, temperature, pH, and why enzymes denature.