Download or read book The Mechanism of Evolution in Leptinotarsa written by William Lawrence Tower and published by . This book was released on 1918 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanism of Evolution in Leptinotarsa written by W. L. Tower and published by . This book was released on 1916 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanism of Evolution in Leptinotarsa written by Joseph Kumler 1886- Rela Breitenbecher and published by Palala Press. This book was released on 2018-03-03 with total page 464 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 The Mechanism of Evolution in Leptinotarsa Classic Reprint written by William Lawrence Tower and published by . This book was released on 2015-08-05 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Mechanism of Evolution in Leptinotarsa The data and conclusions presented in part in this volume are the product of a project in which it was attempted to attack the "evolution problem" in one set of organisms from a number of different aspects. Evolution in organisms must be conceived of as the product of the interaction of internal and external factors, operating in strict mechanistic manner, as in non-vital phenomena, so that the central problem was the determination and proof of the mechanism of action of these two groups of factors whose operations are productive of evolutionary changes. Experimental analysis of the problems, prosecuted with rigor and thoroughness, has been held to be the only means of progress. Before this ideal could be applied much preliminary clearing of the ground had to be done, and to this I gave the necessary attention in a report published under the title "An Investigation of Evolution in Chrysomelid Beetles of the Genus Leptinotarsa." The results of the project have been the development of a mechanistic conception of evolution based upon the interplay of genetic and environic factors and the demonstration that the methods of evolution are heterogeneous, even in one group of organisms. The basis of all methods of change is found to be directly the product of the nature of the genetic factors of composition and their capacity for diverse modes of reaction, especially with factors of the environic complex. Purpose, utility, and kindred concepts have found no support, every change appearing as the chance mechanistic product of the reacting agents; while the product of the reaction either was able or not able to operate under the conditions of origination, so that survival is decided at once and not after long and faltering trials. The project as organized consists of three parts, each necessary to the success of the others and to the hope of arriving at a knowledge of the mechanism of evolution that is not based upon plausibility and the arrangement of isolated facts upon the fabric of preconceived theory. The first stage (reported upon in the publication referred to) must deal with the discovery and testing of some limited set of organisms in nature that are possible subjects for study and especially for the experimental portions of the investigation. Further, it is necessary to become fully acquainted with the organisms in nature and to make preliminary tests to discover whether it is possible to produce permanent changes in the material and the probable success, if any, that might be expected from an experimental attack upon this portion of the problem. The second portion, given a successful outcome of the first, must comprise a rigorous experimental investigation of the factors of evolution and an attempt to create new attributes and qualities not existing in nature in the materials, and to discover the relation of these to old characters and their interaction when brought into combination or into competition with existing characters. 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 Mechanism of Evolution in Leptinotarsa written by HardPress and published by Hardpress Publishing. This book was released on 2013-01 with total page 446 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.
Download or read book The Mechanism of Evolution in Leptinotarsa and Relation of Water to the Behaior of the Potato Beetle in a Desert written by William Lawrence Tower and published by . This book was released on 1918 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The mechanism of evolution in Leptinotarsa by William Lawrence Tower written by William Lawrence Tower and published by . This book was released on 1918 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Mechanism of Evolution in Leptinotarsa Primary Source Edition written by William Lawrence Tower and published by Nabu Press. This book was released on 2013-12-31 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.
Download or read book Relation of Water to the Behavior of the Potato Beetle in a Desert written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genome Evolution of the Colorado Potato Beetle Leptinotarsa Decemlineata Say written by Zachary Cohen and published by . This book was released on 2021 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid evolution is becoming increasingly relevant to evolutionary biologists and ecologists, especially in the context of global environmental change. This thesis is motivated by the goal of understanding the genomic mechanisms and evolutionary history that allow pest insects to rapidly adapt to their environment. A deeper understanding of how agriculturally impactful pest species successfully overcome environmental challenges is not only of fundamental interest, but it can also translate into new efforts to mitigate pest impacts and improve sustainable food production. Few systems exemplify adaptability to environmental novelty and selective pressure as well as agricultural super-pests. This status is reserved for those that have a major impact on crop yield and a propensity for rapid development of pesticide resistance. Among insect super-pests, the Colorado potato beetle, Leptinotarsa decemlineata (Say), is notable for its long history of population outbreaks, global expansion, and repeated evolution of insecticide resistance. To investigate how adaptation in this lineage has occurred since becoming an agricultural pest, I first establish a comparative phylogenomic framework examining the evolution of pest traits in the genus Leptinotarsa in Chapter 1. I use this framework to compare genomic features of CPB against nine closely-related Leptinotarsa species, to determine that CPB, and daughter species, have genome-wide elevated rates of positive selection and genes associated with plant preference, xenobiotic metabolism and stress. Furthermore, this finding seems to be attributed to larger effective population size in these lineages, possibly due to expanded host breadth. In Chapter 2, I refine the CPB reference genome and develop a reference graph of the Colorado potato beetle using pest and non-pest representative individuals. This reference elucidates an important supporting role structural variants have played in the evolution of insecticide resistance. Finally, in Chapter 3, I use population genomic resequencing of two important resistant populations to examine the demographic history, genome-wide recombination maps, and patterns of selective sweeps. I find evidence that CPB pest history mirrors known historical records and that populations exhibit independent evolution of insecticide resistance genes. Altogether, my research shows that CPB evolves insecticide resistance rapidly due to substantial standing genetic variation and by leveraging diverse molecular pathways of resistance.
Download or read book The Mechanism of Mendelian Heredity written by Thomas Hunt Morgan and published by . This book was released on 1923 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Manual of Techniques in Invertebrate Pathology written by Lawrence A. Lacey and published by Springer Science & Business Media. This book was released on 2007-09-27 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt: This field manual is designed to provide background and instruction on a broad spectrum of techniques and their use in the evaluation of entomopathogens in the field. The second edition provides updated information and includes two additional chapters and 12 new contributors. The intended audience includes researchers, graduate students, practitioners of integrated pest management (IPM), regulators and those conducting environmental impact studies of entomopathogens.
Download or read book Biology of Chrysomelidae written by P. Jolivet and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: As in most groups of insects, scientific research on the Chrysomelidae began in Europe in 1758, with the description of a few genera and species by the Scandinavian entomologists C. von Linne, I.C. Fabricius, and others. As the 19th century dawned, many systematic entomologists took up the study of chrysomelid beetles, together with other groups of beetles, and many new species and genera were described from all parts of the world. This trend has, of course, continued down to the present time. However, researches on the Chrysomelidae did not remain restricted to systematics, and many new lines of study have been followed, especially in the present century, by workers who have benefitted from the advances made in related fields of pure and applied entomology. Much has been achieved in the study of the Chrysomelidae, as elsewhere, and it is the aim of the present book to provide a summary and guide to these achievements. It is also to be expected that this book will provide a stimulus for further studies on the Chrysomelidae, so that we can anticipate continuing progress in our knowledge and understanding of this group through the endeavours of an ever-increasing number of scientists. I offer my congratulations to all concerned in the preparation of this book and my best wishes for its success.
Download or read book The System of Animate Nature written by J. Arthur Thompson, M.A., LL.D. and published by . This book was released on 1920 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Interrelationship Between Insects and Plants written by Pierre Jolivet and published by CRC Press. This book was released on 1998-05-27 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the world's most insightful writers on the subject brings together an array of important and readable information on the ways in which insects and plants coexist in nature. Interrelationship Between Insects and Plants is a rare and expansive look at the intertwining of these two vastly different species. Its aim is to summarize in a simple and understandable way the basis of food selection among insects, and to review the various sides of their relationships with plants.
Download or read book Technical Bulletin written by and published by . This book was released on 1949 with total page 1152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The System of Animate Nature written by John Arthur Thomson and published by . This book was released on 1920 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
