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The Conditions Of Existence As Affecting The Perpetuation Of Living Beings
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Book Synopsis The Conditions of Existence as Affecting the Perpetuation of Living Beings by : Thomas Henry Huxley
Download or read book The Conditions of Existence as Affecting the Perpetuation of Living Beings written by Thomas Henry Huxley and published by Good Press. This book was released on 2021-04-25 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a well-researched and brilliantly written book by Thomas Huxley, an English biologist who was instrumental in developing scientific education in Britain. He worked on vertebrates, especially the relationship between man and the apes. Moreover, one of his most significant conclusions was that birds evolved from dinosaurs, small carnivorous theropods.
Book Synopsis The Conditions of Existence as Affecting the Perpetuation of Living Beings by : Thomas Henry Huxley
Download or read book The Conditions of Existence as Affecting the Perpetuation of Living Beings written by Thomas Henry Huxley and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Conditions of Existence As Affecting the Perpetuation of Living Beings by : Thomas H. Huxley
Download or read book Conditions of Existence As Affecting the Perpetuation of Living Beings written by Thomas H. Huxley and published by . This book was released on 2016-01-11 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lecture V. (of VI.), "Lectures To Working Men", at the Museum of Practical Geology, 1863, On Darwin's work: "Origin of Species". IN the last Lecture I endeavoured to prove to you that, while, as a general rule, organic beings tend to reproduce their kind, there is in them, also, a constantly recurring tendency to vary--to vary to a greater or to a less extent. Such a variety, I pointed out to you, might arise from causes which we do not understand; we therefore called it spontaneous; and it might come into existence as a definite and marked thing, without any gradations between itself and the form which preceded it. I further pointed out, that such a variety having once arisen, might be perpetuated to some extent, and indeed to a very marked extent, without any direct interference, or without any exercise of that process which we called selection. And then I stated further, that by such selection, when exercised artificially-- if you took care to breed only from those forms which presented the same peculiarities of any variety which had arisen in this manner--the variation might be perpetuated, as far as we can see, indefinitely. The next question, and it is an important one for us, is this: Is there any limit to the amount of variation from the primitive stock which can be produced by this process of selective breeding? In considering this question, it will be useful to class the characteristics, in respect of which organic beings vary, under two heads: we may consider structural characteristics, and we may consider physiological characteristics.
Book Synopsis The Conditions of Existence as Affecting the Perpetuation of Living Beings by : Thomas Henry Huxley
Download or read book The Conditions of Existence as Affecting the Perpetuation of Living Beings written by Thomas Henry Huxley and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Conditions of Existence as Affecting the Perpetuation of Living Beings Lecture V. (of VI.), 'Lectures to Working Men', at the Museum of Practical Geology, 1863, on Darwin's Work by : Huxley Thomas Henry
Download or read book The Conditions of Existence as Affecting the Perpetuation of Living Beings Lecture V. (of VI.), 'Lectures to Working Men', at the Museum of Practical Geology, 1863, on Darwin's Work written by Huxley Thomas Henry and published by Hardpress Publishing. This book was released on 2016-06-21 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.
Book Synopsis The Conditions of Existence As Affecting the Perpetuation of Living Beings by : Thomas Huxley
Download or read book The Conditions of Existence As Affecting the Perpetuation of Living Beings written by Thomas Huxley and published by . This book was released on 2016-05-15 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: IN the last Lecture I endeavoured to prove to you that, while, as a general rule, organic beings tend to reproduce their kind, there is in them, also, a constantly recurring tendency to vary--to vary to a greater or to a less extent. Such a variety, I pointed out to you, might arise from causes which we do not understand; we therefore called it spontaneous; and it might come into existence as a definite and marked thing, without any gradations between itself and the form which preceded it. I further pointed out, that such a variety having once arisen, might be perpetuated to some extent, and indeed to a very marked extent, without any direct interference, or without any exercise of that process which we called selection. And then I stated further, that by such selection, when exercised artificially--if you took care to breed only from those forms which presented the same peculiarities of any variety which had arisen in this manner--the variation might be perpetuated, as far as we can see, indefinitely. The next question, and it is an important one for us, is this: Is there any limit to the amount of variation from the primitive stock which can be produced by this process of selective breeding? In considering this question, it will be useful to class the characteristics, in respect of which organic beings vary, under two heads: we may consider structural characteristics, and we may consider physiological characteristics. In the first place, as regards structural characteristics, I endeavoured to show you, by the skeletons which I had upon the table, and by reference to a great many well-ascertained facts, that the different breeds of Pigeons, the Carriers, Pouters, and Tumblers, might vary in any of their internal and important structural characters to a very great degree; not only might there be changes in the proportions of the skull, and the characters of the feet and beaks, and so on; but that there might be an absolute difference in the number of the vertebrae of the back, as in the sacral vertebrae of the Pouter; and so great is the extent of the variation in these and similar characters that I pointed out to you, by reference to the skeletons and the diagrams, that these extreme varieties may absolutely differ more from one another in their structural characters than do what naturalists call distinct SPECIES of pigeons; that is to say, that they differ so much in structure that there is a greater difference between the Pouter and the Tumbler than there is between such wild and distinct forms as the Rock Pigeon or the Ring Pigeon, or the Ring Pigeon and the Stock Dove; and indeed the differences are of greater value than this, for the structural differences between these domesticated pigeons are such as would be admitted by a naturalist, supposing he knew nothing at all about their origin, to entitle them to constitute even distinct genera.
Book Synopsis A Framework for K-12 Science Education by : National Research Council
Download or read book A Framework for K-12 Science Education written by National Research Council and published by National Academies Press. This book was released on 2012-03-28 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Science, engineering, and technology permeate nearly every facet of modern life and hold the key to solving many of humanity's most pressing current and future challenges. The United States' position in the global economy is declining, in part because U.S. workers lack fundamental knowledge in these fields. To address the critical issues of U.S. competitiveness and to better prepare the workforce, A Framework for K-12 Science Education proposes a new approach to K-12 science education that will capture students' interest and provide them with the necessary foundational knowledge in the field. A Framework for K-12 Science Education outlines a broad set of expectations for students in science and engineering in grades K-12. These expectations will inform the development of new standards for K-12 science education and, subsequently, revisions to curriculum, instruction, assessment, and professional development for educators. This book identifies three dimensions that convey the core ideas and practices around which science and engineering education in these grades should be built. These three dimensions are: crosscutting concepts that unify the study of science through their common application across science and engineering; scientific and engineering practices; and disciplinary core ideas in the physical sciences, life sciences, and earth and space sciences and for engineering, technology, and the applications of science. The overarching goal is for all high school graduates to have sufficient knowledge of science and engineering to engage in public discussions on science-related issues, be careful consumers of scientific and technical information, and enter the careers of their choice. A Framework for K-12 Science Education is the first step in a process that can inform state-level decisions and achieve a research-grounded basis for improving science instruction and learning across the country. The book will guide standards developers, teachers, curriculum designers, assessment developers, state and district science administrators, and educators who teach science in informal environments.
Book Synopsis U.S. Health in International Perspective by : National Research Council
Download or read book U.S. Health in International Perspective written by National Research Council and published by National Academies Press. This book was released on 2013-04-12 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States is among the wealthiest nations in the world, but it is far from the healthiest. Although life expectancy and survival rates in the United States have improved dramatically over the past century, Americans live shorter lives and experience more injuries and illnesses than people in other high-income countries. The U.S. health disadvantage cannot be attributed solely to the adverse health status of racial or ethnic minorities or poor people: even highly advantaged Americans are in worse health than their counterparts in other, "peer" countries. In light of the new and growing evidence about the U.S. health disadvantage, the National Institutes of Health asked the National Research Council (NRC) and the Institute of Medicine (IOM) to convene a panel of experts to study the issue. The Panel on Understanding Cross-National Health Differences Among High-Income Countries examined whether the U.S. health disadvantage exists across the life span, considered potential explanations, and assessed the larger implications of the findings. U.S. Health in International Perspective presents detailed evidence on the issue, explores the possible explanations for the shorter and less healthy lives of Americans than those of people in comparable countries, and recommends actions by both government and nongovernment agencies and organizations to address the U.S. health disadvantage.
Download or read book Gaia written by James Lovelock and published by Oxford University Press. This book was released on 2016 with total page 169 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gaia, in which James Lovelock puts forward his inspirational and controversial idea that the Earth functions as a single organism, with life influencing planetary processes to form a self-regulating system aiding its own survival, is now a classic work that continues to provoke heated scientific debate.
Book Synopsis On the Origin of Species, Or, The Causes of the Phenomena of Organic Nature by : Thomas Henry Huxley
Download or read book On the Origin of Species, Or, The Causes of the Phenomena of Organic Nature written by Thomas Henry Huxley and published by . This book was released on 1863 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Twelve Lectures and Essays by : Thomas Henry Huxley
Download or read book Twelve Lectures and Essays written by Thomas Henry Huxley and published by . This book was released on 1908 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Concepts of Biology by : Samantha Fowler
Download or read book Concepts of Biology written by Samantha Fowler and published by . This book was released on 2017-12-30 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: The images in this textbook are in color. There is a less-expensive non-color version available - search for ISBN 9781680922202. Concepts of Biology is designed for the introductory biology course for nonmajors taught at most two- and four-year colleges. The scope, sequence, and level of the program are designed to match typical course syllabi in the market. Concepts of Biology includes interesting applications, features a rich art program, and conveys the major themes of biology.
Book Synopsis ON THE ORIGIN OF SPEICIES: OR, THE CAUSES OF THE PHENOMENA OF ORGANIC NATURE by : THOMAS H. HUXLEY, F.R.S., F.L.S.
Download or read book ON THE ORIGIN OF SPEICIES: OR, THE CAUSES OF THE PHENOMENA OF ORGANIC NATURE written by THOMAS H. HUXLEY, F.R.S., F.L.S. and published by . This book was released on 1890 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis On the Origin of Species by : Thomas Henry Huxley
Download or read book On the Origin of Species written by Thomas Henry Huxley and published by . This book was released on 1890 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Natural History Review written by and published by . This book was released on 1868 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes the transactions of the Belfast Natural History and Philosophical Society, Cork Cuvierian Society, and Dublin Natural History Society.
Book Synopsis Select Works of Thomas H. Huxley by : Thomas Henry Huxley
Download or read book Select Works of Thomas H. Huxley written by Thomas Henry Huxley and published by . This book was released on 1886 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Lancet written by and published by . This book was released on 1911 with total page 1802 pages. Available in PDF, EPUB and Kindle. Book excerpt:
