Distinctive features, especially the emphasis on principles of evolution and zoological science, have been strengthened. The overall organization of this text has proven to work well to help students understand the content. With the eighteenth edition, the authors bring a wealth of real experience as they describe the diversity of animal life and the fascinating adaptations that enable animals to inhabit so many ecological niches. Integrated Principles of Zoology continues to be the leading text for the introductory zoology course. Integrated Principles of Zoology, Eighteenth Edition.
