The bestselling *AP Biology study guide-now updated to reflect changes in the test Over 120,000 high school students take the AP Biology exam each year. This new edition of the bestselling guide features an additional practice test to give students more experience and build their skills and confidence. The practice tests include answers and explanations to help students pinpoint areas for further study. With reviews and exercises addressing all of the test topics plus proven test-taking strategies for both the multiple choice and essay parts of the test, this guide helps students get a higher score. When the pressure's on, students know Cliffs is the answer. Phillip E. Pack, PhD (Altadena, CA) has taught AP Biology and gifted programs for over 15 years. He is an assistant professor of math and science at Woodbury University in Burbank, California.