Download or read book Acceleration of Development in Fossil Cephalopoda written by James Perrin Smith and published by Stanford University Press. This book was released on 1914 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acceleration of Development in Fossil Cephalopoda written by Edwin Chapin Starks and published by . This book was released on 1913 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acceleration of Development in Fossil Cephalopoda written by James Perrin Smith and published by Palala Press. This book was released on 2016-05-10 with total page 98 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 Acceleration of Development in Fossil Cephalopoda written by James Perrin Smith (géologue).) and published by . This book was released on 1914 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Acceleration of Development in Fossil Cephalopoda written by James Perrin Smith and published by Stanford University Press. This book was released on 1914 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Professional Paper written by and published by . This book was released on 1927 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Geological Survey Professional Paper written by and published by . This book was released on 1902 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Upper Triassic Marine Invertebrate Faunas of North America written by James Perrin Smith and published by . This book was released on 1927 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Professional Paper United States Geological Survey written by Geological Survey (U.S.) and published by . This book was released on 1927 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heterochrony in Evolution written by Michael L. McKinney and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: ... an adult poet is simply an individual in a state of arrested development-in brief, a sort of moron. Just as all of us, in utero, pass through a stage in which we are tadpoles, ... so all of us pass through a state, in our nonage, when we are poets. A youth of seventeen who is not a poet is simply a donkey: his development has been arrested even anterior to that of the tadpole. But a man of fifty who still writes poetry is either an unfortunate who has never developed, intellectually, beyond his teens, or a conscious buffoon who pretends to be something he isn't-something far younger and juicier than he actually is. -H. 1. Mencken, High and Ghostly Matters, Prejudices: Fourth Series (1924) Where would evolution be, Without this thing, heterochrony? -M. L. McKinney (1987) One of the joys of working in a renascent field is that it is actually possible to keep up with the literature. So it is with mixed emotions that we heterochronists (even larval forms like myself) view the recent "veritable explosion of interest in heterochrony" (in Gould's words in this volume). On the positive side, it is ob viously necessary and desirable to extend and expand the inquiry; but one regrets that already we are beginning to talk past, lose track of, and even ignore each other as we carve out individual interests.
Download or read book Advancing Research on Living and Fossil Cephalopods written by Federico Olóriz and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Relying on the latest analytical techniques, this all-embracing new reference offers comprehensive coverage of the development, evolution, and morphology of both fossil and living cephalopods. In 34 in-depth chapters a group of 51 international neontologists and peleontologists offer and opverview of current methods, data, analyses, and interpretations, and posit suggestions for future research. With its unparalleled combination of first-rate contributions on living and fossil cephalopods, this book provides researchers and advanced students in paleontology, invertebrate zoology, evolutionary biology, and allied disciplines with a trove of recent data and authoritative interpretations that will immeasurably benefit their own studies.
Download or read book Ammonoid Paleobiology written by Neil H. Landman and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 857 pages. Available in PDF, EPUB and Kindle. Book excerpt: Renowned researchers summarize the current knowledge on ammonoid paleobiology. The book begins with a description of the systematic position of the Ammonoidea within the Cephalopoda, providing the phylogenetic framework for the rest of the book. Following discussions include soft- and hard-part morphology of ammonoids, rate of growth and ontogeny, and taphonomy and ecology. Closing chapters explore the distribution of ammonoids in time and space as well as their extinction at the end of the Cretaceous. With its diverse viewpoints and new material, this resource will benefit researchers and graduate students in paleontology, marine biology, and evolutionary biology.
Download or read book Aberdeen University Studies written by and published by . This book was released on 1921 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subject Catalogue written by University of Aberdeen. Cruickshank Science Library and published by . This book was released on 1921 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cruickshank Science Library Subject Catalogue written by University of Aberdeen. Cruickshank Science Library and published by . This book was released on 1921 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ontogeny and Phylogeny written by Stephen Jay Gould and published by Harvard University Press. This book was released on 1985-01-17 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: “Ontogeny recapitulates phylogeny” was Haeckel’s answer—the wrong one—to the most vexing question of nineteenth-century biology: what is the relationship between individual development (ontogeny) and the evolution of species and lineages (phylogeny)? In this, the first major book on the subject in fifty years, Stephen Jay Gould documents the history of the idea of recapitulation from its first appearance among the pre-Socratics to its fall in the early twentieth century. Mr. Gould explores recapitulation as an idea that intrigued politicians and theologians as well as scientists. He shows that Haeckel’s hypothesis—that human fetuses with gill slits are, literally, tiny fish, exact replicas of their water-breathing ancestors—had an influence that extended beyond biology into education, criminology, psychoanalysis (Freud and Jung were devout recapitulationists), and racism. The theory of recapitulation, Gould argues, finally collapsed not from the weight of contrary data, but because the rise of Mendelian genetics rendered it untenable. Turning to modern concepts, Gould demonstrates that, even though the whole subject of parallels between ontogeny and phylogeny fell into disrepute, it is still one of the great themes of evolutionary biology. Heterochrony—changes in developmental timing, producing parallels between ontogeny and phylogeny—is shown to be crucial to an understanding of gene regulation, the key to any rapprochement between molecular and evolutionary biology. Gould argues that the primary evolutionary value of heterochrony may lie in immediate ecological advantages for slow or rapid maturation, rather than in long-term changes of form, as all previous theories proclaimed. Neoteny—the opposite of recapitulation—is shown to be the most important determinant of human evolution. We have evolved by retaining the juvenile characters of our ancestors and have achieved both behavioral flexibility and our characteristic morphology thereby (large brains by prolonged retention of rapid fetal growth rates, for example). Gould concludes that “there may be nothing new under the sun, but permutation of the old within complex systems can do wonders. As biologists, we deal directly with the kind of material complexity that confers an unbounded potential upon simple, continuous changes in underlying processes. This is the chief joy of our science.”
Download or read book Bibliography of North American Geology written by Geological Survey (U.S.) and published by . This book was released on 1923 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1785/1918 includes material issued previously in the annual Bibliography of North America geology, and in cumulative volumes issued by N. H. Darton and F. B. Weeks. 1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.
