This introduction develops scientific literacy with clear, lively prose, compelling real-world applications, and unique features that help students understand the relevance of biology in their lives. The Third Edition has been carefully revised for clarity and ease of use, with helpful new pedagogy, an expansion of the text's vibrant art program, and a new chapter organization. The Third Edition also features unique, fully integrated multimedia resources for students and instructors. This flexible text is available in formats to suit every classroom. The Full Edition includes seven units, while the Core Topics Edition omits the chapters on animal and plant physiology. Custom print versions of the Core Topics Edition are available for instructors who wish to teach selected chapters from the animal and plant physiology units. In addition, a customizable eBook allows students to order either the full text or individual chapters.