550 AP biology practice questions

This study guide's features: "Practice your way to perfection: 2 full-length practice tests and 16 practice drills covering each subject type ; Practice drills organized by the 4 'Big Ideas.' Academic and strategic explanations: Detailed walkthroughs of free response questions to help you write a winning essay ; Answer keys and detailed explanations for each drill and test question. Techniques that actually work: Tried-and-true strategies to avoid traps and beat the test ; Essential tactics to help you work smarter, not harder"--Page 4 of cover.