Download or read book Embryos and Ancestors written by Sir Gavin De Beer and published by . This book was released on 1958 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Embryos and Ancestors written by Gavin R. de Beer and published by . This book was released on 1951 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Embryos and Ancestors written by Gavin R. de Beer and published by . This book was released on 1951 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Embryos and Ancestors written by Gr De Beer and published by Franklin Classics Trade Press. This book was released on 2018-11-10 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Shaping Life written by John Maynard Smith and published by Yale University Press. This book was released on 1999-01-01 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past ten years, there has been a revolution in our understanding of developmental biology, as scientists apply the ideas and techniques of genetics and embryology to the processes of development. In this book, John Maynard Smith gives an account of the progress that has been made in this field -- in our knowledge of both the development of individuals and the evolution of the species. Maynard Smith points out that there is a parallel between the developmental changes that convert an egg into an adult and the evolutionary changes converted simple single-celled ancestors into the existing array of multicellular animals and plants. Genetic studies provide the necessary link between development and evolution: natural selection explains how information is incorporated in the genome, and development shows what use is made of it during the development of each individual. Traditionally, two very different views have been held about development. Maynard Smith argues that the differences between them are not so much scientific as ideological -- one can be considered reductionist and the other holistic. But because of advances in the science underpinning both viewpoints, he says, the possibility of a dialogue between them is great, which will be beneficial to the entire discipline.
Download or read book Haeckel s Embryos written by Nick Hopwood and published by University of Chicago Press. This book was released on 2015-05-11 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emphasizing the changes worked by circulation and copying, interpretation and debate, this book uses the case to explore how pictures succeed and fail, gain acceptance and spark controversy. It reveals how embryonic development was made a process that we can see, compare, and discuss, and how copying - usually dismissed as unoriginal
Download or read book The Evolution of Man Volume 2 written by Ernst Heinrich Philipp August Haeckel and published by Createspace Independent Publishing Platform. This book was released on 2018-06-27 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Evolution of Man - Volume 2 by Ernst Heinrich Philipp August Haeckel In turning from the embryology to the phylogeny of man-from the development of the individual to that of the species-we must bear in mind the direct causal connection that exists between these two main branches of the science of human evolution. This important causal nexus finds its simplest expression in "the fundamental law of organic development," the content and purport of which we have fully considered in the first chapter. According to this biogenetic law, ontogeny is a brief and condensed recapitulation of phylogeny. If this compendious reproduction were complete in all cases, it would be very easy to construct the whole story of evolution on an embryonic basis. When we wanted to know the ancestors of any higher organism, and, therefore, of man-to know from what forms the race as a whole has been evolved we should merely have to follow the series of forms in the development of the individual from the ovum; we could then regard each of the successive forms as the representative of an extinct ancestral form. However, this direct application of ontogenetic facts to phylogenetic ideas is possible, without limitations, only in a very small section of the animal kingdom. There are, it is true, still a number of lower invertebrates (for instance, some of the Zoophyta and Vermalia) in which we are justified in recognising at once each embryonic form as the historical reproduction, or silhouette, as it were, of an extinct ancestor. But in the great majority of the animals, and in the case of man, this is impossible, because the embryonic forms themselves have been modified through the change of the conditions of existence, and have lost their original character to some extent. During the immeasurable course of organic history, the many millions of years during which life was developing on our planet, secondary changes of the embryonic forms have taken place in most animals. The young of animals (not only detached larvae, but also the embryos enclosed in the womb) may be modified by the influence of the environment, just as well as the mature organisms are by adaptation to the conditions of life; even species are altered during the embryonic development. Moreover, it is an advantage for all higher organisms (and the advantage is greater the more advanced they are) to curtail and simplify the original course of development, and thus to obliterate the traces of their ancestors. The higher the individual organism is in the animal kingdom, the less completely does it reproduce in its embryonic development the series of its ancestors, for reasons that are as yet only partly known to us. The fact is easily proved by comparing the different developments of higher and lower animals in any single stem. We are delighted to publish this classic book as part of our extensive Classic Library collection. Many of the books in our collection have been out of print for decades, and therefore have not been accessible to the general public. The aim of our publishing program is to facilitate rapid access to this vast reservoir of literature, and our view is that this is a significant literary work, which deserves to be brought back into print after many decades. The contents of the vast majority of titles in the Classic Library have been scanned from the original works. To ensure a high quality product, each title has been meticulously hand curated by our staff. Our philosophy has been guided by a desire to provide the reader with a book that is as close as possible to ownership of the original work. We hope that you will enjoy this wonderful classic work, and that for you it becomes an enriching experience.
Download or read book Understanding Evolution written by Kostas Kampourakis and published by Cambridge University Press. This book was released on 2014-04-03 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together conceptual obstacles and core concepts of evolutionary theory, this book presents evolution as straightforward and intuitive.
Download or read book The Incredible Unlikeliness of Being Evolution and the Making of Us written by Alice Roberts and published by Heron Books. This book was released on 2015-11-03 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: "From your brain to your fingertips, you emerge from her book entertained and with a deeper understanding of yourself" --Richard Dawkins Alice Roberts takes you on the most incredible journey, revealing your path from a single cell to a complex embryo to a living, breathing, thinking person. It's a story that connects us with our distant ancestors and an extraordinary, unlikely chain of events that shaped human development and left a mark on all of us. Alice Roberts uses the latest research to uncover the evolutionary history hidden in all of us, from the secrets found only in our embryos and genes - including why as embroyos we have what look like gills - to those visible in your anatomy. This is a tale of discovery, exploring why and how we have developed as we have. This is your story, told as never before.
Download or read book Mitochondrial Replacement Techniques written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-04-17 with total page 201 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mitochondrial replacement techniques (MRTs) are designed to prevent the transmission of mitochondrial DNA (mtDNA) diseases from mother to child. While MRTs, if effective, could satisfy a desire of women seeking to have a genetically related child without the risk of passing on mtDNA disease, the technique raises significant ethical and social issues. It would create offspring who have genetic material from two women, something never sanctioned in humans, and would create mitochondrial changes that could be heritable (in female offspring), and therefore passed on in perpetuity. The manipulation would be performed on eggs or embryos, would affect every cell of the resulting individual, and once carried out this genetic manipulation is not reversible. Mitochondrial Replacement Techniques considers the implications of manipulating mitochondrial content both in children born to women as a result of participating in these studies and in descendants of any female offspring. This study examines the ethical and social issues related to MRTs, outlines principles that would provide a framework and foundation for oversight of MRTs, and develops recommendations to inform the Food and Drug Administration's consideration of investigational new drug applications.
Download or read book Embryos in Deep Time written by Marcelo Sánchez-Villagra and published by Univ of California Press. This book was released on 2012-04-03 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: How can we bring together the study of genes, embryos and fossils? Embryos in Deep Time is a critical synthesis of the study of individual development in fossils. It brings together an up-to-date review of concepts from comparative anatomy, ecology and developmental genetics, and examples of different kinds of animals from diverse geological epochs and geographic areas. Can fossil embryos demonstrate evolutionary changes in reproductive modes? How have changes in ocean chemistry in the past affected the development of marine organisms? What can the microstructure of fossil bone and teeth reveal about maturation time, longevity and changes in growth phases? This book addresses these and other issues and documents with numerous examples and illustrations how fossils provide evidence not only of adult anatomy but also of the life history of individuals at different growth stages. The central topic of Biology today—the transformations occurring during the life of an organism and the mechanisms behind them—is addressed in an integrative manner for extinct animals.
Download or read book Your Inner Fish written by Neil Shubin and published by Vintage. This book was released on 2008-01-15 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paleontologist and professor of anatomy who co-discovered Tiktaalik, the “fish with hands,” tells a “compelling scientific adventure story that will change forever how you understand what it means to be human” (Oliver Sacks). By examining fossils and DNA, he shows us that our hands actually resemble fish fins, our heads are organized like long-extinct jawless fish, and major parts of our genomes look and function like those of worms and bacteria. Your Inner Fish makes us look at ourselves and our world in an illuminating new light. This is science writing at its finest—enlightening, accessible and told with irresistible enthusiasm.
Download or read book Ancestors in Evolutionary Biology written by Ronald A. Jenner and published by Cambridge University Press. This book was released on 2022-07-28 with total page 401 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phylogenetics emerged in the second half of the nineteenth century as a speculative storytelling discipline dedicated to providing narrative explanations for the evolution of taxa and their traits. It coincided with lineage thinking, a process that mentally traces character evolution along lineages of hypothetical ancestors. Ancestors in Evolutionary Biology traces the history of narrative phylogenetics and lineage thinking to the present day, drawing on perspectives from the history of science, philosophy of science, and contemporary scientific debates. It shows how the power of phylogenetic hypotheses to explain evolution resides in the precursor traits of hypothetical ancestors. This book provides a comprehensive exploration of the topic of ancestors, which is central to modern biology, and is therefore of interest to graduate students, researchers, and academics in evolutionary biology, palaeontology, philosophy of science, and the history of science.
Download or read book She Has Her Mother s Laugh written by Carl Zimmer and published by Penguin. This book was released on 2018-05-29 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt: 2019 PEN/E.O. Wilson Literary Science Writing Award Finalist "Science book of the year"—The Guardian One of New York Times 100 Notable Books for 2018 One of Publishers Weekly's Top Ten Books of 2018 One of Kirkus's Best Books of 2018 One of Mental Floss's Best Books of 2018 One of Science Friday's Best Science Books of 2018 “Extraordinary”—New York Times Book Review "Magisterial"—The Atlantic "Engrossing"—Wired "Leading contender as the most outstanding nonfiction work of the year"—Minneapolis Star-Tribune Celebrated New York Times columnist and science writer Carl Zimmer presents a profoundly original perspective on what we pass along from generation to generation. Charles Darwin played a crucial part in turning heredity into a scientific question, and yet he failed spectacularly to answer it. The birth of genetics in the early 1900s seemed to do precisely that. Gradually, people translated their old notions about heredity into a language of genes. As the technology for studying genes became cheaper, millions of people ordered genetic tests to link themselves to missing parents, to distant ancestors, to ethnic identities... But, Zimmer writes, “Each of us carries an amalgam of fragments of DNA, stitched together from some of our many ancestors. Each piece has its own ancestry, traveling a different path back through human history. A particular fragment may sometimes be cause for worry, but most of our DNA influences who we are—our appearance, our height, our penchants—in inconceivably subtle ways.” Heredity isn’t just about genes that pass from parent to child. Heredity continues within our own bodies, as a single cell gives rise to trillions of cells that make up our bodies. We say we inherit genes from our ancestors—using a word that once referred to kingdoms and estates—but we inherit other things that matter as much or more to our lives, from microbes to technologies we use to make life more comfortable. We need a new definition of what heredity is and, through Carl Zimmer’s lucid exposition and storytelling, this resounding tour de force delivers it. Weaving historical and current scientific research, his own experience with his two daughters, and the kind of original reporting expected of one of the world’s best science journalists, Zimmer ultimately unpacks urgent bioethical quandaries arising from new biomedical technologies, but also long-standing presumptions about who we really are and what we can pass on to future generations.
Download or read book Ancestor written by Scott Sigler and published by Crown. This book was released on 2010-06-22 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: “The ancestors are out there…you have to believe me.” From acclaimed author Scott Sigler—New York Times bestselling creator of Infected and Contagious—comes a tale of genetic experimentation’s worst nightmare come true. Every five minutes, a transplant candidate dies while waiting for a heart, a liver, a kidney. Imagine a technology that could provide those life-saving transplant organs for a nominal fee ... and imagine what a company would do to get a monopoly on that technology. On a remote island in the Canadian Arctic, PJ Colding leads a group of geneticists who have discovered this holy grail of medicine. By reverse-engineering the genomes of thousands of mammals, Colding's team has dialed back the evolutionary clock to re-create humankind’s common ancestor. The method? Illegal. The result? A computer-engineered living creature, an animal whose organs can be implanted in any person, and with no chance of transplant rejection. There's just one problem: these ancestors are not the docile herd animals that Colding's team envisioned. Instead, Colding’s work has given birth to something big, something evil. With these killer creatures on the prowl, Colding and the woman he loves must fight to survive — even as government agents close in to shut the project down, and the deep-pocketed company backing this research proves to have its own cold-blooded agenda. As the creators become the prey in the ultimate battle for survival, Scott Sigler takes readers on the ultimate thrill-ride—and offers a chilling cautionary account of what can happen when hubris, greed, and madness drive scientific experimentation past the brink of reason.
Download or read book The Ancestor s Tale written by Richard Dawkins and published by Houghton Mifflin Harcourt. This book was released on 2004 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: A renowned biologist provides a sweeping chronicle of more than four billion years of life on Earth, shedding new light on evolutionary theory and history, sexual selection, speciation, extinction, and genetics.
Download or read book Ebook Vertebrates Comparative Anatomy Function Evolution written by Kenneth Kardong and published by McGraw Hill. This book was released on 2014-10-16 with total page 817 pages. Available in PDF, EPUB and Kindle. Book excerpt: This one-semester text is designed for an upper-level majors course. Vertebrates features a unique emphasis on function and evolution of vertebrates, complete anatomical detail, and excellent pedagogy. Vertebrate groups are organized phylogenetically, and their systems discussed within such a context. Morphology is foremost, but the author has developed and integrated an understanding of function and evolution into the discussion of anatomy of the various systems.
