🧬 TOUGH AP Biology Practice Exam – 40 Questions (Multi-Unit Review)This rigorous, AP Biology–level practice exam is designed to challenge students with application-based, data-driven, and conceptually integrated questions across multiple AP Biology units. This is not a basic recall test—students must analyze data sets, apply biological principles, and reason through unfamiliar scenarios, just like on the AP Biology exam. Perfect for unit summative assessments, cumulative reviews, mock exa