A concise and engaging biology text for biology majors, Understanding Biology 4e partnered with Connect emphasizes fundamentals concepts to help students better understand biology and focus on developing scientific skills. This approach utilizes the Vision and Change guidelines of Core Concepts and Core Skills while helping students begin the process of becoming a scientist.

The Raven & Johnson's Biology author team is committed to continually improving the text, keeping the student and learning foremost. The integrated pedagogical features expand the students' learning process and enhance their learning experience. This latest edition of the text maintains the clear, accessible, and engaging writing style of past editions with the solid framework of pedagogy that highlights an emphasis on evolution and scientific inquiry that have made this a leading textbook for students majoring in biology. This emphasis on the organizing power of evolution is combined with an integration of the importance of cellular, molecular biology and genomics to offer our readers a text that is student friendly and current. Additionally, with McGraw Hill Connect, powerful digital tools augment instruction by helping students think more critically, develop quantitative and graphing skills and apply their knowledge in a laboratory setting. Connect Virtual Labs can be implemented in a hybrid or fully online setting to help students prepare for the wet lab and strengthening their lab experience.

'One of the best books on evolutionary biology for a broad readership ever written' Edward O. Wilson A dazzling tour of evolution in action that sheds light on one of the greatest debates in science The natural world is full of fascinating instances of convergence: phenomena like eyes and wings and tree-climbing lizards that have evolved independently, multiple times. Convergence suggests that evolution is predictable, and if we could replay the tape of life, we would get the same outcome. But there are also many examples of contingency, cases where the tiniest change - a random mutation or an ancient butterfly sneeze - caused evolution to take a completely different course. In Improbable Destinies, renowned researcher Jonathan Losos reveals what the latest breakthroughs in evolutionary biology tell us about one of the greatest ongoing debates in science. Evolution can occur far more rapidly than Darwin expected, which has opened the door to something that was previously thought impossible: experimental studies of evolution in nature. Drawing on his own work with anole lizards on the Caribbean islands, as well as studies of guppies, foxes, field mice and others being conducted around the world, Losos reveals just how rapid and predictable evolution can be. By charting the discoveries of the scientists who are rewriting our understanding of evolutionary biology, Improbable Destinies will change the way we think and talk about evolution.

Adaptive radiation, which results when a single ancestral species gives rise to many descendants, each adapted to a different part of the environment, is possibly the single most important source of biological diversity in the living world. One of the best-studied examples involves Caribbean "Anolis "lizards. With about 400 species, "Anolis "has played an important role in the development of ecological theory and has become a model system exemplifying the integration of ecological, evolutionary, and behavioral studies to understand evolutionary diversification. This major work, written by one of the best-known investigators of "Anolis, "reviews and synthesizes an immense literature. Jonathan B. Losos illustrates how different scientific approaches to the questions of adaptation and diversification can be integrated and examines evolutionary and ecological questions of interest to a broad range of biologists.

Committed to Excellence. This edition continues the evolution of Raven & Johnson's "Biology." The author team is committed to continually improving the text, "keeping the student and learning foremost." We have integrated new pedagogical features to guide the student through the learning process. This latest edition of the text maintains the clear, accessible, and engaging writing style of past editions with the solid framework of pedagogy that highlights an emphasis on evolution and scientific inquiry that have made this a leading textbook for students majoring in biology. This emphasis on the organizing power of evolution is combined with an integration of the importance of cellular, molecular biology and genomics to offer our readers a text that is student friendly and current.

Our author team is committed to producing the best possible text for both student and faculty. The lead author, Kenneth Mason, "University of Iowa," has taught majors biology at three different major public universities for more than fifteen years. Jonathan Losos, "Harvard University," is at the cutting edge of evolutionary biology research, and Susan Singer, "Carleton College," has been involved in science education policy issues on a national level.