New to This Edition
New Big Ideas and Chapter Transit Maps In this Seventh Edition, we take our conceptual emphasis to the next level, reframing each chapter with a smaller set of overarching concepts—”Big Ideas”—that are introduced at the beginning of the chapter. Each big idea corresponds to a major section of the chapter, and they are tied together in a “transit map” that shows the route by which the student will proceed through the chapter.
More Engaging Narrative and a New Look With the goal of making the concepts of biology more accessible and increasing the overall friendliness of the book, every chapter in this edition makes greater use of analogies, intriguing facts, examples that relate topics to the student and the real world, engaging questions, and a more conversational tone. The fresh new design used for the pages and the redesign of many figures make the book more accessible. See pages 280–281 for an example.
New Scientific Discovery Modules This edition gives greater emphasis to “how we know what we know” through a new type of module, called Scientific Discovery and marked with an orange tab. For example, the new Module 16.11 introduces Koch’s postulates for identifying the cause of an infectious disease and relates how Australian microbiologist Barry Marshall used these criteria to demonstrate that most peptic ulcers are caused by a particular bacterium (a discovery that won him a Nobel Prize). Along with new Scientific Discovery modules created for this edition, we have recast Talking About Science modules and some other material from the last edition in the Scientific Discovery format to help make research advances more vivid to students. The improved introduction to the process of science in Chapter 1 will equip students to appreciate the many examples throughout the book of how scientific concepts emerge from observations and experimental evidence.
The Latest Science Biology is a dynamic field of study, and we have always taken pride in our book’s currency and scientific accuracy. For this edition, as always, we have integrated the results of the latest scientific research throughout the book. We have done this with careful thought, recognizing that research advances can lead to new ways of looking at biological topics; such changes in perspective can necessitate organizational changes in our textbook to better reflect the current state of a field. You will find a unit-by-unit account of new content and organizational improvements in the “New Content” section on pp. xvi–xvii, following this Preface.
New MasteringBiology® A specially developed version of MasteringBiology, the most widely used online tutorial and assessment program for biology, is now included with Campbell Biology: Concepts & Connections. The book’s authors have created over 200 new Mastering activities to help students understand core concepts. An average of five author-created activities per chapter help students learn vocabulary, extend the book’s emphasis on visual learning, demonstrate the connections among key concepts (helping students grasp the big ideas), and coach students on how to interpret data. Included online are 18 BioFlix® 3-D animations of difficult topics (with accompanying tutorials), new Video Tutor Sessions, MP3 Tutor Sessions, Discovery Channel™ Videos, and YouDecide and GraphIt! activities.
This Book’s Flexibility
Though a biology textbook’s table of contents must be linear, biology itself is more like a web of related concepts without a single starting point or prescribed path. Courses can navigate this network starting with molecules, with ecology, or somewhere in between, and most courses omit some topics. Campbell Biology: Concepts & Connections is uniquely suited to serve this variety of courses. The seven units of the book are largely self-contained, and in a number of the units, chapters can be assigned in a different order without much loss of coherence. The use of numbered modules makes it easy to omit modules or to relocate modules within a syllabus.