Focus on the key concepts to help build a foundation for further study. Scientifically based. The text teaches students how to read and critically evaluate the current research. Every chapter is subdivided into a series of conceptual sections, each introduced by a Sentence Heading that summarizes the Principle being described in that section. In addition, the importance of scientific evidence is highlighted by including more than 50 graphs, histograms, and pie charts containing data from the scientific literature, each accompanied by a citation to the original source of the data. Art that Teaches. Each piece of art in the text has been carefully considered to ensure that readers can easily absorb the data. A bulleted Summary of Main Concepts is found at the end of each chapter helping students review the major principles covered in that chapter. Suggested Reading lists are included at the end of each chapter with an emphasis on review articles and carefully selected research publications that students are likely to find especially relevant and understandable. A Glossary containing a brief definition of every boldfaced term is included as a reference tool at the end of the book. Each definition is followed by one or more page references indicating where in the book the meaning of the term is described. The artwork that accompanies the text is designed to accomplish several different objectives. Some line drawings are designed to illustrate or summarize important biological concepts and activities related to cancer, whereas others describe the ways in which particular experiments have been conceptualized and carried out.