Developmental Biology, Sixth Edition explores and synthesizes the organismal, cellular, and molecular aspects of animal development, and expands its coverage of the medical, environmental, and evolutionary aspects of developmental biology. Shorter than the previous edition by some 200 pages (deleted material available at www.devbio.com), the Sixth Edition features up-to-date research, a new full-color art program, chapter reorganization and new chapter summaries, and two new chapters -- "Mechanisms of Plant Development, " by Susan R. Singer of Carleton College, and "Metamorphosis, Regeneration, and Aging." Included with every copy of the book, and referenced throughout the text, is Vade Mecum: An Interactive Guide to Developmental Biology, a CD-ROM by Mary S. Tyler and Ronald N. Kozlowski of the University of Maine.