AP Biology — Natural Selection

Natural Selection is the seventh of 8 units in the College Board's current AP BiologyCourse & Exam Description. It builds on Gene Expression and Regulation and sets up Ecology.

Our Natural Selection set has 8 practice questions, each with a written explanation, a one-line key takeaway, and a rationale for every wrong choice — so you learn why the right answer is right and why each distractor is tempting. You can work them as a timed set or read the worked solutions straight through.