This book is built on a steadfast tradition of accurate science, engaging presentation and media innovation. The readers' experience is enhanced with the new MediaTutor CD-ROM that is integrated into each chapter through the use of MediaTutor Tabs. The result is a program that helps you draw readers into biology through an engaging text and interactive media. This book focuses on the key concepts of cell biology, genetics, evolution, plant and animal anatomy and physiology, and ecology. For anyone interested in introductory biology.