Review of photosynthesis, including light-dependent and light-independent reactions, and their significance in cellular energetics.

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Starting now and over the next few months, we will be releasing updated content for AP® Biology. We’ve spent the past year working with internal and external experts to review and refine our …

For the past two years, we’ve been working hard to build an AP Biology course full of helpful videos and articles, along with rigorous and engaging practice. This month, we’re publishing a …

Our AP Bio practice questions are in the style of the exam's multiple choice section, and we also have some videos of Sal working through AP Bio free-response questions, so both of these …

Learn about photosynthesis in plants, including the process and importance of converting light energy into chemical energy.

Explanation of the Calvin cycle in photosynthesis, including its stages and importance in converting carbon dioxide into glucose.

Just in time for the 2020 AP Biology exam, we’re adding even more content to our AP® Biology course! This year’s exam will cover Units 1 through 6, so we’re adding new exercises to Unit 6: …

Khan Academy offers a comprehensive and updated AP Biology course with videos, articles, exercises, quizzes, and unit tests.

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