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Evolution And Speciation In Animals
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Book Synopsis Evolution and Speciation in Animals by : T. J. Pandian
Download or read book Evolution and Speciation in Animals written by T. J. Pandian and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Spatial distribution -- Coevolution and diversity -- Food and feeding modes -- Gonochorism and males -- Hermaphroditism and selfing -- Parthenogenesis and unisexualism -- Clonals and stem cells -- Mitosis and meiosis -- Oogenesis and vitellogenesis -- Spermatogenesis and spermatophores -- Female- vs male-heterogamety -- Eutelism and parasitism -- Monogamy vs. Polygamy -- Semelparity vs iteroparity -- Spawning and oviposition -- Fertilization success -- Fecundity -- Direct and indirect life cycle -- Brooding and viviparity -- Feeding and non-feeding larvae -- Parasites and hosts -- Sex determination and differentiation -- Metamorphosis and recruitment -- Message from fossils -- Conservation -- Climate change.
Book Synopsis Animal Species and Evolution by : Ernst Mayr
Download or read book Animal Species and Evolution written by Ernst Mayr and published by Belknap Press. This book was released on 1963 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt: This masterly and long-awaited work is a full exposition, synthesis, summation, and critical evaluation of the present state of man's knowledge about the nature of animal species and of the part they play in the processes of evolution. In a series of twenty chapters, Mr. Mayr presents a consecutive story, beginning with a description of evolutionary biology and ending with a discussion of man as a biological species. Calling attention to unsolved problems, and relating the evolutionary subject matter to appropriate material from other fields, such as physiology, genetics, and biochemistry, the author integrates and interprets existing data. Believing that an unequivocal stand is more likely to produce constructive criticism than evasion of an issue, he does not hesitate to choose that interpretation of a controversial matter which to him seems most consistent with the emerging picture of the evolutionary process. Between the terminal points mentioned above, Mr. Mayr pursues the narrative through discussions of species concepts and their application, morphological species characters and sibling species, biological properties of species, isolating mechanisms, hybridization, the variation and genetics of populations, storage and protection of genetic variation, the unity of the genotype, geographic variation, the polytypic species of the taxonomist, the population structure of species, kinds of species, multiplication of species, geographic speciation, the genetics of speciation, the ecology of speciation, and species and transpecific evolution. The volume provides a valuable glossary; and an inclusive bibliography greatly extends its range for those who wish to investigate special aspects of the material. Animal Species and Evolution is presented as a permanent entity. In accordance with the author's feeling that the acquisition of new knowledge will require a new statement, rather than an emendation of a previous one, no substantive revisions of this volume are planned for future printings. Because of the impossibility of experimenting with man, and because an understanding of man's biology is indispensable for safeguarding his future, emphasis throughout this book is placed on those findings from the higher animals which are directly applicable to man. In his final chapter on hominids and the various forms of Homo, Mr. Mayr comes to the conclusion that, while modem man appears to be just as well adapted for survival purposes as were his ancestors, there is much evidence to suggest that he is threatened by the loss of his most typically human characteristics. It would be within his power to reverse this tendency.
Book Synopsis Evolution and Speciation in Animals by : T. J. Pandian
Download or read book Evolution and Speciation in Animals written by T. J. Pandian and published by CRC Press. This book was released on 2021-09-23 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents the first attempt to quantify environmental factors and life history traits that accelerate or decelerate species diversity in animals. About 15%, 8% and 77% of species are distributed in marine (70% of earth’s surface), freshwater (terra firma fosters more diversity. The harsh hadal, desert and elevated montane habitats restrict diversity to 0.5-4.2%. Costing more time and energy, osmotrophic and suspension modes of food acquisition limit diversity to Selfing hermaphrodites (0.9%), parthenogens ( Incidence of heterogamety is four-times more in males than in females. Hence, evolution is more a male-driven process. Egg size is determined by environmental factors, but lecithality is genetically fixed. In poikilotherms, sex is also determined by gene(s), but differentiation by environmental factors. The extra-ovarian vitellogenesis (> 96%), spermatozoan (81%) rather than spermatophore mechanism of sperm transfer, promiscuity and polygamy over monogamy, iteroparity (99.6%) over semelparity and internal fertilization (84%) are preferred, as they accelerate diversity. Body size and egg size determine fecundity. Indirect life cycle (82%) and incorporation of feeding larval stages accelerate diversity. Brooding and viviparity (6.4%) decelerate it. Parasitism extends life span and liberates fecundity from eutelism. Evolution is an ongoing process, and speciation and extinction are its unavoidable by-products. The in-built conservation mechanism of reviving life after a sleeping duration has been reduced from a few million years in microbial spores to a few thousand years in plant seeds and a few hundred years in dormant eggs in animals. Hence, animal conservation requires priority. The existence of temperature-resistant/insensitive individuals, strains and species shall flourish during the ongoing global warming and earth shall continue with such burgeoning species, hopefully inclusive of man.
Download or read book Endless Forms written by Daniel J. Howard and published by Oxford University Press, USA. This book was released on 1998 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Speciation is one of the great themes of evolutionary biology. It is the process through which new species are born and diversity generated. Yet for many years our understanding of the process consisted of little more than a perception that if populations are isolated geographically, they will diverge genetically and may come to form new species. This situation began to change in the 1960s as an increasing number of biologists challenged the exclusivity of allopatric speciation and began to probe more deeply into the actual process by which divergence occurs and reproductive isolation is acquired. This focus on process led to many new insights, but numerous questions remain and speciation is now one of the most dynamic areas of research in modern evolutionary biology. This volume presents the newest research findings on speciation bringing readers up to day on species concepts, modes of speciation, and the nature of reproductive barriers. It also discusses the forces that drive divergence of populations, the genetic control of reproductive isolation, and the role played by hybrid zones and hybridization in speciation.
Book Synopsis Species, Species Concepts and Primate Evolution by : William H. Kimbel
Download or read book Species, Species Concepts and Primate Evolution written by William H. Kimbel and published by Springer Science & Business Media. This book was released on 2013-12-18 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: A world of categones devmd of spirit waits for life to return. Saul Bellow, Humboldt's Gift The stock-in-trade of communicating hypotheses about the historical path of evolution is a graphical representation called a phylogenetic tree. In most such graphics, pairs of branches diverge from other branches, successively marching across abstract time toward the present. To each branch is tied a tag with a name, a binominal symbol that functions as does the name given to an individual human being. On phylogenetic trees the names symbolize species. What exactly do these names signify? What kind of information is communicated when we claim to have knowledge of the following types? "Tetonius mathewzi was ancestral to Pseudotetonius ambiguus. " "The sample of fossils attributed to Homo habzlis is too variable to contain only one species. " "Interbreeding populations of savanna baboons all belong to Papio anubis. " "Hylobates lar and H. pileatus interbreed in zones of geographic overlap. " While there is nearly universal agreement that the notion of the speczes is fundamental to our understanding of how evolution works, there is a very wide range of opinion on the conceptual content and meaning of such particular statements regarding species. This is because, oddly enough, evolutionary biolo gists are quite far from agreement on what a species is, how it attains this status, and what role it plays in evolution over the long term.
Book Synopsis Continuity And Evolution Of Animals by : N.S. Sharma
Download or read book Continuity And Evolution Of Animals written by N.S. Sharma and published by Mittal Publications. This book was released on 2005 with total page 314 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 2018-01-07 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concepts of Biology is designed for the single-semester introduction to biology course for non-science majors, which for many students is their only college-level science course. As such, this course represents an important opportunity for students to develop the necessary knowledge, tools, and skills to make informed decisions as they continue with their lives. Rather than being mired down with facts and vocabulary, the typical non-science major student needs information presented in a way that is easy to read and understand. Even more importantly, the content should be meaningful. Students do much better when they understand why biology is relevant to their everyday lives. For these reasons, Concepts of Biology is grounded on an evolutionary basis and includes exciting features that highlight careers in the biological sciences and everyday applications of the concepts at hand.We also strive to show the interconnectedness of topics within this extremely broad discipline. In order to meet the needs of today's instructors and students, we maintain the overall organization and coverage found in most syllabi for this course. A strength of Concepts of Biology is that instructors can customize the book, adapting it to the approach that works best in their classroom. Concepts of Biology also includes an innovative art program that incorporates critical thinking and clicker questions to help students understand--and apply--key concepts.
Book Synopsis Evolution and Speciation by : William R. Atchley
Download or read book Evolution and Speciation written by William R. Atchley and published by Cambridge University Press. This book was released on 1981-05-29 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: This 1981 collection focuses on a wide range of topics in the general field of evolutionary biology. The authors have all been associated with Professor M. J. D. White, who was the world authority on chromosomal evolution and speciation, to whom this volume was presented on his seventieth birthday.
Book Synopsis On the Origin of Species Illustrated by : Charles Darwin
Download or read book On the Origin of Species Illustrated written by Charles Darwin and published by . This book was released on 2020-09-30 with total page 770 pages. Available in PDF, EPUB and Kindle. Book excerpt: On the Origin of Species (or, more completely, On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life), [3] published on 24 November 1859, is a work of scientific literature by Charles Darwin which is considered to be the foundation of evolutionary biology.[4] Darwin's book introduced the scientific theory that populations evolve over the course of generations through a process of natural selection. It presented a body of evidence that the diversity of life arose by common descent through a branching pattern of evolution. Darwin included evidence that he had gathered on the Beagle expedition in the 1830s and his subsequent findings from research, correspondence, and experimentation
Book Synopsis The Apple Maggot by : Bennet Allen Porter
Download or read book The Apple Maggot written by Bennet Allen Porter and published by . This book was released on 1928 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Populations, Species, and Evolution by : Ernst Mayr
Download or read book Populations, Species, and Evolution written by Ernst Mayr and published by Harvard University Press. This book was released on 1970 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: In his extraordinary book, Mayr fully explored, synthesized, and evaluated man's knowledge about the nature of animal species and the part they play in the process of evolution. Now, in this long-awaited abridged edition, Mayr's definitive work is made available to the interested nonspecialist, the college student, and the general reader.
Book Synopsis Populations, Species, and Evolution by : Ernst Mayr
Download or read book Populations, Species, and Evolution written by Ernst Mayr and published by Belknap Press. This book was released on 1970 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt: An abridgement of Animal Species and Evolution.
Book Synopsis Animal Species and Their Evolution by : A. J. Cain
Download or read book Animal Species and Their Evolution written by A. J. Cain and published by Princeton University Press. This book was released on 2014-07-14 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long before Charles Darwin undertook his first voyage, animal taxonomists had begun the scientific classification of animals, plants, and minerals. In the mid-1950s, taxonomist A. J. Cain summarized the state of knowledge about the structure of the living world in his major book Animal Species and Their Evolution. His work remains remarkably current today. Here Cain explains each of the terms by which scientists now classify all animals--from species through genus, family, order, class, and phylum. The work of the modern taxonomist is dependent on the work of paleontologists, field biologists, ecologists, and other specialists who help piece together the puzzle of nature. This seminal text will interest students in each of these areas. It will also appeal to historians of science and to all amateur scientists with an interest in the animal kingdom. Originally published in 1993. 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 editions preserve the original texts of these important books while presenting them in durable paperback and hardcover 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.
Book Synopsis Species and Speciation in the Fossil Record by : Warren D. Allmon
Download or read book Species and Speciation in the Fossil Record written by Warren D. Allmon and published by University of Chicago Press. This book was released on 2016-10-05 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The literature of paleobiology is brimming with qualifiers and cautions about using species in the fossil record, or equating such species with those recognized among living organisms. Species and Speciation in the Fossil Record digs through this literature and surveys the recent research on species in paleobiology. In these pages, experts in the field examine what they think species are - in their particular taxon of specialty or more generally in the fossil record. They also reflect on what the answers mean for thinking about species in macroevolution. The first step in this approach is an overview of the Modern Synthesis, and paleobiology’s development of quantitative ways of documenting and analyzing variation with fossil assemblages. Following that, this volume’s central chapters explore the challenges of recognizing and defining species from fossil specimens, and show how with careful interpretation and a clear species concept, fossil species may be sufficiently robust for meaningful paleobiological analyses. Tempo and mode of speciation over time are also explored, exhibiting how the concept of species, if more refined, can reveal enormous amounts about the interplay between species origins and extinction and local and global climate change.
Book Synopsis Evolution and the Diversity of Life by : Ernst Mayr
Download or read book Evolution and the Diversity of Life written by Ernst Mayr and published by Harvard University Press. This book was released on 1997 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt: The diversity of living forms and the unity of evolutionary processes are the focus of these essays. The collection helps form much of the basis of contempoary undertanding of evolutionary biology.
Book Synopsis Evolution For Dummies by : Greg Krukonis
Download or read book Evolution For Dummies written by Greg Krukonis and published by John Wiley & Sons. This book was released on 2011-04-20 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, most colleges and universities offer evolutionary study as part of their biology curriculums. Evolution For Dummies will track a class in which evolution is taught and give an objective scientific view of the subject. This balanced guide explores the history and future of evolution, explaining the concepts and science behind it, offering case studies that support it, and comparing evolution with rival theories of creation, such as intelligent design. It also will identify the signs of evolution in the world around us and explain how this theory affects our everyday lives and the future to come.
Book Synopsis How and Why Species Multiply by : Peter R. Grant
Download or read book How and Why Species Multiply written by Peter R. Grant and published by Princeton University Press. This book was released on 2020-03-31 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Charles Darwin's experiences in the Galápagos Islands in 1835 helped to guide his thoughts toward a revolutionary theory: that species were not fixed but diversified from their ancestors over many generations, and that the driving mechanism of evolutionary change was natural selection. In this concise, accessible book, Peter and Rosemary Grant explain what we have learned about the origin and evolution of new species through the study of the finches made famous by that great scientist: Darwin's finches. Drawing upon their unique observations of finch evolution over a thirty-four-year period, the Grants trace the evolutionary history of fourteen different species from a shared ancestor three million years ago. They show how repeated cycles of speciation involved adaptive change through natural selection on beak size and shape, and divergence in songs. They explain other factors that drive finch evolution, including geographical isolation, which has kept the Galápagos relatively free of competitors and predators; climate change and an increase in the number of islands over the last three million years, which enhanced opportunities for speciation; and flexibility in the early learning of feeding skills, which helped species to exploit new food resources. Throughout, the Grants show how the laboratory tools of developmental biology and molecular genetics can be combined with observations and experiments on birds in the field to gain deeper insights into why the world is so biologically rich and diverse. Written by two preeminent evolutionary biologists, How and Why Species Multiply helps to answer fundamental questions about evolution--in the Galápagos and throughout the world.
