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Homology—a similar trait shared by different species and derived from common ancestry, such as a seal’s fin and a bird’s wing—is one of the most fundamental yet challenging concepts in evolutionary biology. This groundbreaking book provides the first mechanistically based theory of what homology is and how it arises in evolution.
Günter Wagner, one of the preeminent researchers in the field, argues that homology, or character identity, can be explained through the historical continuity of character identity networks—that is, the gene regulatory networks that enable differential gene expression. He shows how character identity is independent of the form and function of the character itself because the same network can activate different effector genes and thus control the development of different shapes, sizes, and qualities of the character. Demonstrating how this theoretical model can provide a foundation for understanding the evolutionary origin of novel characters, Wagner applies it to the origin and evolution of specific systems, such as cell types; skin, hair, and feathers; limbs and digits; and flowers.
The first major synthesis of homology to be published in decades, Homology, Genes, and Evolutionary Innovation reveals how a mechanistically based theory can serve as a unifying concept for any branch of science concerned with the structure and development of organisms, and how it can help explain major transitions in evolution and broad patterns of biological diversity.
Unearthing the Origins of Monkeys, Apes, and Humans
Taking us back roughly 45 million years into the Eocene, "the dawn of recent life," Chris Beard, a world-renowned expert on the primate fossil record, offers a tantalizing new perspective on our deepest evolutionary roots. In a fast-paced narrative full of vivid stories from the field, he reconstructs our extended family tree, showing that the first anthropoids—the diverse and successful group that includes monkeys, apes, and humans—evolved millions of years earlier than was previously suspected and emerged in Asia rather than Africa.
In The Hunt for the Dawn Monkey, Beard chronicles the saga of two centuries of scientific exploration in search of anthropoid origins, from the early work of Georges Cuvier, the father of paleontology, to the latest discoveries in Asia, Africa, and North America's Rocky Mountains. Against this historical backdrop, he weaves the story of how his own expeditions have unearthed crucial fossils—including the controversial primate Eosimias—that support his compelling new vision of anthropoid evolution. The only book written for a wide audience that explores this remote phase of our own evolutionary history, The Hunt for the Dawn Monkey adds a fascinating new chapter to our understanding of humanity's relationship to the rest of life on earth.
Since its discovery in I960, the hybridization of somatic cells has evolved from a biological curiosity into an analytical method that today underlies nearly all investigations of the genetic aspects of various biological phenomena. As an eyewitness to this development from its inception forward, Boris Ephrussi here relates the history of somatic hybridization and the formation of its methodology, lie follows with a discussion of the characteristics and properties of the resultant hybrid cells. Together, these topics comprise an authoritative introduction to the principles of the technique.
Dr. Ephrussi proceeds to an examination in greater detail of three specific areas of biological research to which the techniques of hybridization are currently being applied with promising consequences. Thus the major part of the book deals with applications of somatic hybridization to mammalian genetics, cell differentiation, and cancer.
Originally published in 1972.
The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These paperback editions preserve the original texts of these important books while presenting them in durable paperback editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.
In Pursuit of Early Mammals presents the history of the mammals that lived during the Mesozoic era, the time when dinosaurs ruled the Earth, and describes their origins, anatomy, systematics, paleobiology, and distribution. It also tells the story of the author, a world-renowned specialist on these animals, and the other prominent paleontologists who have studied them. Zofia Kielan-Jaworowska was the first woman to lead large-scale paleontological expeditions, including eight to the Gobi Desert in Mongolia, which brought back important collections of dinosaur, early mammal, and other fossils. She shares the difficulties and pleasures encountered in finding rare fossils and describes the changing views on early mammals made possible by these discoveries.
The first book of its kind, In Quest of Great Lakes Ice Age Vertebrates details the Ice Age fishes, amphibians, reptiles, birds and mammals in the provinces and states surrounding the Great Lakes. Holman's work begins with definitions of concepts and terms for the general audience and a general discussion of how the last ice age, the Pleistocene Epoch, affected our physical and biological world. Methods employed and tools used in the collection of vertebrate fossils, as well as ethics and protocol in the maintenance of a useful collection follow, coupled with details of each animal's structure, habits, habitats, and ecological importance. The heart of the book is a species-by-species account of the Pleistocene vertebrates of the region, followed by an examination of the compelling problems of the Pleistocene relative to faunal interpretations, including overall ecological makeup of the region's fauna, vertebrate range adjustment that occurred in the region, Pleistocene extinction effects on the animals of the region, the aftermath of the Ice Age, and a look at what the future may hold for the region.
How Creationists Built the Campaign against Evolution
This volume examines how Saving Our Lives Hear Our Truths, or SOLHOT, a radical youth intervention, provides a space for the creative performance and expression of Black girlhood and how this creativity informs other realizations about Black girlhood and womanhood. Founded in 2006 and co-organized by the author, SOLHOT is an intergenerational collective organizing effort that celebrates and recognizes Black girls as producers of culture and knowledge. Girls discuss diverse expressions of Black girlhood, critique the issues that are important to them, and create art that keeps their lived experiences at its center. Drawing directly from her experiences in SOLHOT, Ruth Nicole Brown argues that when Black girls reflect on their own lives, they articulate radically unique ideas about their lived experiences. She documents the creative potential of Black girls and women who are working together to advance original theories, practices, and performances that affirm complexity, interrogate power, and produce humanizing representation of Black girls' lives. Emotionally and intellectually powerful, this book expands on the work of Black feminists and feminists of color and breaks intriguing new ground in Black feminist thought and methodology.
Olfactory Perception from Neurobiology to Behavior
Written by a neurobiologist and a psychologist, this volume presents a new theory of olfactory perception. Drawing on research in neuroscience, physiology, and ethology, Donald A. Wilson and Richard J. Stevenson address the fundamental question of how we navigate through a world of chemical encounters and provide a compelling alternative to the "reception-centric" view of olfaction. The major research challenge in olfaction is determining how the brain discriminates one smell from another. Here, the authors hold that olfaction is generally not a simple physiochemical process, but rather a plastic process that is strongly tied to memory. They find the traditional approach—which involves identifying how particular features of a chemical stimulus are represented in the olfactory system—to be at odds with historical data and with a growing body of neurobiological and psychological evidence that places primary emphasis on synthetic processing and experiential factors. Wilson and Stevenson propose that experience and cortical plasticity not only are important for traditional associative olfactory memory but also play a critical, defining role in odor perception and that current views are insufficient to account for current and past data. The book includes a broad comparative overview of the structure and function of olfactory systems, an exploration into the mechanisms of odor detection and olfactory perception, and a discussion of the implications of the authors' theory. Learning to Smell will serve as an important reference for workers within the field of chemical senses and those interested in sensory processing and perception.
Revealing the Unseen Lives of Plants and Animals
Have you ever wondered what left behind those prints and tracks on the seashore, or what made those marks or dug those holes in the dunes? Life Traces of the Georgia Coast is an up-close look at these traces of life and the animals and plants that made them. It tells about the how the tracemakers lived and how they interacted with their environments. This is a book about ichnology (the study of such traces), a wonderful way to learn about the behavior of organisms, living and long extinct. Life Traces presents an overview of the traces left by modern animals and plants in this biologically rich region; shows how life traces relate to the environments, natural history, and behaviors of their tracemakers; and applies that knowledge toward a better understanding of the fossilized traces that ancient life left in the geologic record. Augmented by numerous illustrations of traces made by both ancient and modern organisms, the book shows how ancient trace fossils directly relate to modern traces and tracemakers, among them, insects, grasses, crabs, shorebirds, alligators, and sea turtles. The result is an aesthetically appealing and scientifically accurate book that will serve as both a source book for scientists and for anyone interested in the natural history of the Georgia coast.
Ecology and Adaptive Radiation of Anoles
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.