The only study guide you'll need for the AP Biology test--revised and updated, now with a 20-question Diagnostic QuizConfidence is key when taking any exam, and it will come easier if you spend your test prep time wisely--even if you've been so busy that you've put off preparing until the last weeks before the exam. You'll find the smartest, most effective test prep in 5 Steps to a 5: 500 AP Biology Questions to Know by Test Day, Fourth Edition. Written by an expert in the field who knows the exam inside and out, the questions closely resemble those you'll face on exam day, and include detailed review explanations for both right and wrong answers.5 Steps to a 5: 500 AP Biology Questions to Know by Test Day, Fourth Edition is updated for the latest exam, featuring only those types of questions you'll see on this year's exam, plus a super-helpful 20 Question Diagnostic quiz to test your knowledge. No matter how busy you are, this 5 Steps to a 5 guide will help you make the most of your last-minute study to build the skills you need in a minimal amount of time.Features: 500 AP-style questions and answers referenced to core AP materialsNEW! 20 Question Diagnostic Quiz to test your knowledgeQuestions parallel the topic, format, and degree of difficulty of those in the AP exam, followed by answers with comprehensive, easy-to-understand explanationsGrid-in questions have been removed to reflect the latest exam formatDetailed review explanations for right and wrong answersIdeal and effective last-minute practice to help build the skills you need in a minimal amount of time