David Krogh’s Biology: A Guide to the Natural World leads readers on a memorable journey through the world of biology, using relevant examples, clearly-developed illustrations, and helpful insights that resonate with today’s students.    Widely-recognized as a book that students enjoy reading, the Fifth Edition has been thoroughly updated with new discussions on social concerns and health applications, along with streamlined chapter summaries and expanded review questions. To address different learning styles, the book’s clear illustrations and exercises are reinforced with the engaging, efficient MasteringBiology® learning and assessment program and a full suite of instructor resources.