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Focusing on the concepts of biology, The World of Biology, Fifth Edition emphasizes the evolutionary and ecological relationships of the diverse organisms that inhabit our planet. The principal goals of this text are to provide students with the tools needed to function as biologically literate citizens and to develop in students an appreciation for science as evolving and dynamic. Engaging Chapter introductions, Concept Connections, and new Thinking Critically questions engage students in concepts of biology. A substantially revised Chapter 2 on the process of science encourages students to understand how scientists think. Major revision of genetics, ecology and botany units reflects current research.