Download or read book The Ancestry of the Vertebrates written by Richard Peter Spencer Jefferies and published by . This book was released on 1986 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ancestry of Vertebrates as a Means of Understanding the Principal Features of Their Structure and Development written by H. C. Delsman and published by . This book was released on 1922 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ancestry of Vertebrates as a Means of Understanding the Principal Features of Their Structure and Development written by Hendricus Christoffel Delsman and published by Legare Street Press. This book was released on 2023-07-18 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An exploration of the origins of vertebrate anatomy and evolution, featuring detailed illustrations and scientific analysis. 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. 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 The Ancestry of Vertebrates written by H. C. Delsman and published by Forgotten Books. This book was released on 2017-12-20 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Ancestry of Vertebrates: As a Means of Understanding the Principal Features of Their Structure and Development Those who have read the book to the end will admit that this theory, to say the least of it, merits earnest consideration. They will admit that, unlike most other similar theories, it not only serves to explain known facts but that also its application has advanced us further in several respects. Of these I will mention here only the problem of the hypoglossus and its relation to the gill-slits and the cranium (cf. Plate and the results given in the last chapter. In the treating of the different problems, I have tried each time to give the reader first an idea of the divergent opinions and the confusion often prevailing. Though this does not make the reading of the book easier and more agreeable - problems having been made often much more complicated by the investigators than they are in reality I have thought it advisable to do so in order to emphasize the value of a means of escaping from this confusion. The expressing of a persons thoughts correctly in a foreign language is no easy matter. I 'am greatly indebted, therefore, to Mr. Humphreys, officer of the Royal Flying Corps who was interned in The Hague during the year 1918. For having gone over with me the whole article, and to Mr. Moon, engineer of Batavia, for having once more reread with me the proofs If in spite of this the English be not yet perfect, I trust that these imperfections, if any, will not give rise to any misunderstandings. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book The Ancestry of Vertebrates as a Means of Understanding the Principal Features of Their Structure and Development written by and published by . This book was released on 1921 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ancestry of Vertebrates as a Means of Understanding the Principal Features of Their Structure and Development written by and published by . This book was released on 1922 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ANCESTRY OF VERTEBRATES AS A M written by Hendricus Christoffel 1886- Delsman and published by Wentworth Press. This book was released on 2016-08-24 with total page 258 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 was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. 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. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. 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 Across the Bridge written by Henry Gee and published by University of Chicago Press. This book was released on 2018-07-04 with total page 325 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Addresses an important topic for biologists and zoologists about vertebrates’ place in the ‘grand scheme’ . . . genuinely witty and charming . . . magnificent.” —Neil J. Gostling, University of Southampton Our understanding of vertebrate origins and the backbone of human history evolves with each new fossil find and DNA map. Many species have now had their genomes sequenced, and molecular techniques allow genetic inspection of even non-model organisms. But as longtime Nature editor Henry Gee argues in Across the Bridge, despite these giant strides and our deepening understanding of how vertebrates fit into the tree of life, the morphological chasm between vertebrates and invertebrates remains vast and enigmatic. As Gee shows, even as scientific advances have falsified a variety of theories linking these groups, the extant relatives of vertebrates are too few for effective genetic analysis. Moreover, the more we learn about the species that do remain—from sea-squirts to starfish—the clearer it becomes that they are too far evolved along their own courses to be of much use in reconstructing what the latest invertebrate ancestors of vertebrates looked like. Fossils present yet further problems of interpretation. Tracing both the fast-changing science that has helped illuminate the intricacies of vertebrate evolution as well as the limits of that science, Across the Bridge helps us to see how far the field has come in crossing the invertebrate-to-vertebrate divide—and how far we still have to go. “A beautiful ode to some of the least appreciated animals . . . guides the reader joyfully through deuterostomes—weaving disparate elements of embryology, paleontology, and morphology into an unprecedented and accessible narrative.” —Jakob Vinther, University of Bristol
Download or read book Before the Backbone written by H. Gee and published by Springer Science & Business Media. This book was released on 2007-07-27 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: We cannot catechise our stony ichthyolites, as did the necromantic lady of the Arabian Nights did the coloured fishes of the lake which had once been a city, when she touched their dead bodies with her wand, and they straightaway raised their heads and rephed to her queries. We would have many a question to ask them if we could - questions never to be solved. Hugh Miller, The Old Red Sandstone When I started this book in 1991, the subject of vertebrate origins was fusty and unfashionable. Early drafts for this preface read like an extend ed complaint at the lot of traditional morphologists, cast aside by the march of modern molecular biology. But no longer - this book should reach you at a time of renewed inter est in the origin of the vertebrates, our own particular corner of creation. For although the topic has excited interest for well over a century, molec ular biology has only lately achieved the maturity necessary to test its predictions. As a legitimate field of study, it is fashionable again.
Download or read book The Origin of Vertebrates written by Walter Holbrook Gaskell and published by . This book was released on 1908 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cephalic Homologies written by Charles Sedgwick Minot and published by . This book was released on 1897 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bridging the Gap written by Roberta Jane Beeson and published by . This book was released on 1978 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: Determination of the Vertebrate pedigree was a particularly enigmatic problem for evolutionary morphologists of the early post-Darwinian period. At that time, practically no characteristics were known by which the Vertebrates could be linked to any of the other animal groups. Up to the 1850's, most research in embryology and anatomy had reinforced the idea that wide differences existed in the basic structural and developmental patterns of Vertebrates and animals belonging to other branches of the animal kingdom. As a result, morphological practice was affected by a strong tradition against comparison of Vertebrates and Invertebrates. With the acceptance of the evolutionary viewpoint, it became theoretically valid to compare animals of different types, based on the possibility of their remote common ancestry. However, the practical matter of demonstrating that relationship with concrete evidence proved to be one of the most difficult challenges confronting early evolutionary morphology. Three different theories were proposed between 1864 and 1870, each attempting to link the Vertebrates and one of the Invertebrate groups to a hypothetical common ancestor. In 1864, Franz Leydig proposed an evolutionary relationship between Arthropods and Vertebrates; in 1866, Ernst Haeckel attempted to connect Vertebrates with Roundworms; and in 1868, on the basis of new research by Aleksandr Kovalevskii, Haeckel proposed another theory which linked Vertebrates with Tunicates. The proposals which formed the basis of the Tunicate theory became the center of a heated debate in the late 1860's and early 1870's. As a result of new research and criticism related to this debate, Haeckel made significant modifications in a revised version of the Tunicate theory which was published in 1874. In this dissertation, the problem of Vertebrate ancestry is presented as a testing ground for the newlyemerging principles of evolutionary morphology. The content and reception of the first three theories of Vertebrate ancestry are examined and compared and the development of the Tunicate theory is traced from its original form as a provisional hypothesis to its later form as a definitive theory. Particular emphasis has been placed on describing and analyzing the scientific work on which support and criticism of the various theories of Vertebrate ancestry was based, and in determining the working principles that various morphologists applied in approaching the problem of Vertebrate ancestry. Such an emphasis demonstrates that a wide variety of philosophical, methodological and empirical concerns existed within the world community of evolutionary morphologists during the early post-Darwinian period. By testing the applicability of their various viewpoints to the solution of the problem of Vertebrate ancestry, these morphologists made significant contributions to the conceptual progress of evolutionary morphology, particularly to the development of a new, genetic concept of homology.
Download or read book The Origin of Vertebrates written by Walter Holbrook Gaskell and published by CreateSpace. This book was released on 2014-10-04 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: This collection of literature attempts to compile many of the classic works that have stood the test of time and offer them at a reduced, affordable price, in an attractive volume so that everyone can enjoy them.
Download or read book The Vertebrate IntegumentVolume 1 written by Theagarten Lingham-Soliar and published by Springer Science & Business Media. This book was released on 2014-02-18 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vertebrate integument arose about 450 million years ago as an ‘armour’ of dermal bony plates in small, jawless fish-like creatures, informally known as the ostracoderms. This book reviews the major changes that have occurred in the vertebrate integument from its beginnings to the present day. Critical questions concerning the origin, structure and functional biology of the bony integument are discussed and intrinsically linked to major steps in vertebrate evolution and phylogeny—the origin of jaws and the origin of teeth. The discussions include the origins of mineralization of major vertebrate skeletal components such as the dermatocranium, branchial arches and vertebral column. The advances that led to the origin of modern fishes and their phylogenetic development are reviewed and include the evolution of fins and replacement of the bony plates with several types of dermal scales. The evolution of reptiles saw a major transformation of the integument, with the epidermis becoming the protective outermost layer, from which the scales arose, while the dermis lay below it. The biological significance of the newly-evolved β-keratin in reptilian scales, among the toughest natural materials known, is discussed in the context of its major contribution to the great success of reptiles and to the evolution of feathers and avian flight. The dermis in many vertebrates is strengthened by layers of oppositely oriented cross-fibres, now firmly entrenched as a design principle of biomechanics. Throughout the book conventional ideas are discussed and a number of new hypotheses are presented in light of the latest developments. The long evolutionary history of vertebrates indicates that the significance of the Darwinian concept of “survival of the fittest” may be overstated, including in our own mammalian origins and that chance often plays a major role in evolutionary patterns. Extensive illustrations are included to support the verbal descriptions. Professor Theagarten Lingham-Soliar is in the Department of Life Sciences at the University of KwaZulu-Natal.
Download or read book Brains Through Time written by Georg F. Striedter and published by Oxford University Press. This book was released on 2019-12-24 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: When did the first vertebrates emerge, and how did they differ from their invertebrate ancestors? When did vertebrates evolve jaws, paired fins, pattern vision, or a neocortex? How have evolutionary innovations such as these impacted vertebrate behavior and success? Georg Striedter and Glenn Northcutt answer these fundamental questions about all major vertebrate lineages. Highlighting the key innovations of each major taxonomic group, they review how evolutionary changes in vertebrate genetics, anatomy, and physiology are reflected in the nervous system. This highly accessible book allows readers to explore a vast expanse of scientific knowledge, ranging from paleoecology to comparative molecular biology, sensory biology to neural circuit evolution, and fossil anatomy to animal behavior. Brains Through Time examines how vertebrate nervous systems evolved in conjunction with other organ systems and the planet's ecology. Surveying an enormous range of information on genes and proteins, sensory and motor systems, central neural circuits, physiology, and animal behavior, the authors reconstruct the major changes that occurred as vertebrates emerged and then diversified. In the process, readers are transported back in time to key stages of vertebrate evolution, notably the origin of vertebrates, the evolution of paired fins and jaws, the transition to life on land, and the origins of warm-blooded mammals and birds.
Download or read book Discussion of the Origin of Vertebrates January 20 and February 3 1910 written by Walter Holbrook Gaskell and published by . This book was released on 1910 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Origin of Vertebrates written by Norman John Berrill and published by . This book was released on 1972* with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt:
