Bøger af August Weismann

August Weismann entkräftet in diesem Buch den Einfluss von Herbert Spencers Vererbungstheorie. Indem er seine eigene Theorie der Determination durch die Keimzellen präsentiert, trägt Weismann dazu bei, das Verständnis der Vererbung und Evolution zu revolutionieren.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.

Eine bahnbrechende Studie von August Weismann über den Saisondimorphismus bei Schmetterlingen. Dieses Buch hat signifikante Beiträge zur Abstammungstheorie geleistet und wird auch heute noch von Wissenschaftlern wie Forschern genutzt.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.

August Weismanns Buch 'Beiträge zur Naturgeschichte der Daphnoiden' beschäftigt sich mit der Biologie der Daphnien. Dabei geht er unter anderem auf ihre Lebensweise, Fortpflanzung und Evolution ein. Ein wichtiges Buch für alle, die sich für Zoologie und Evolutionsbiologie interessieren.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.

""On Germinal Selection As A Source Of Definite Variation"" is a scientific book written by August Weismann and published in 1896. The book explores the idea of germinal selection, which is the theory that certain variations in organisms are caused by the selection of germ cells during reproduction. Weismann argues that this process is responsible for the creation of new species and the evolution of life on Earth. The book is divided into several chapters, each of which explores a different aspect of germinal selection, including its relationship to natural selection, the role of the environment in shaping variation, and the mechanisms by which germ cells are selected. Weismann's ideas were controversial at the time of publication, but they have since become an important part of the scientific understanding of evolution and genetics. Overall, ""On Germinal Selection As A Source Of Definite Variation"" is a seminal work in the history of evolutionary biology and an important contribution to the scientific literature of its time.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

Dieses Buch ist ein bahnbrechendes Werk der Vererbungslehre. Der Autor, August Weismann, argumentiert, dass die Kontinuität des Keimplasmas die Grundlage für die Vererbung von Eigenschaften bei Tieren und Pflanzen ist. Das Werk hat einen großen Einfluss auf die Entwicklung der Vererbungslehre und ist ein Muss für alle, die sich für Biologie und Genetik interessieren. 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.

""Die Allmacht Der Naturzuchtung: Eine Erwiderung An Herbert Spencer (1893)"" ist ein Buch von August Weismann, das eine Antwort auf die Theorien von Herbert Spencer zur Evolutionstheorie darstellt. Weismann, ein deutscher Biologe und Genetiker, argumentiert in diesem Werk, dass die nat�����rliche Selektion der entscheidende Faktor bei der Evolution von Arten ist und dass die Vererbung von Merkmalen durch Gene eine wichtige Rolle spielt. Er kritisiert Spencers Ideen, dass die Vererbung von erworbenen Eigenschaften eine Rolle bei der Evolution spielt und dass die Evolution ein zielgerichteter Prozess sei. Weismanns Buch ist ein wichtiger Beitrag zur Debatte �����ber die Evolutionstheorie im sp�����ten 19. Jahrhundert und hat bis heute Einfluss auf die moderne Biologie.This Book Is In German.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

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.

""Aufs�����tze �����ber Vererbung V1: Und Verwandte Biologische Fragen"" ist ein Buch von August Weismann, das im Jahr 1892 ver������ffentlicht wurde. Das Werk beinhaltet eine Sammlung von Aufs�����tzen, die sich mit verschiedenen biologischen Fragen befassen, insbesondere mit dem Thema der Vererbung. Weismann, ein bekannter deutscher Biologe des 19. Jahrhunderts, untersucht in diesem Buch die verschiedenen Theorien und Konzepte, die damals in der Wissenschaft diskutiert wurden.Das Buch ist in drei Teile unterteilt. Der erste Teil besch�����ftigt sich mit der Vererbung und den verschiedenen Arten von Vererbung, einschlie�����lich der Vererbung von Merkmalen durch Chromosomen. Der zweite Teil behandelt die Evolution und die Rolle der nat�����rlichen Selektion bei der Entstehung neuer Arten. Der dritte Teil widmet sich verschiedenen biologischen Fragen, wie zum Beispiel der Frage nach dem Ursprung des Lebens.Insgesamt bietet ""Aufs�����tze �����ber Vererbung V1: Und Verwandte Biologische Fragen"" einen umfassenden �����berblick �����ber die damaligen Diskussionen und Theorien in der Biologie. Das Buch ist ein wichtiger Beitrag zur Geschichte der biologischen Wissenschaften und hat bis heute Einfluss auf die moderne Genetik und Evolutionsbiologie.This Book Is In German.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

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.

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.

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. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ Die Entwicklung Der Dipteren: E. Beitr. Zur Entwicklungsgeschichte D. Insecten August Weismann Engelmann, 1864

Amphimixis oder: Die Vermischung der Individuen ist ein Buch des deutschen Biologen August Weismann, das erstmals im Jahr 1891 ver������ffentlicht wurde. Das Buch behandelt die Theorie der Vererbung und beschreibt den Prozess der sexuellen Fortpflanzung und der Vermischung von Genen. Weismann argumentiert, dass die Vermischung von Genen durch sexuelle Fortpflanzung eine wichtige Rolle bei der Entstehung neuer Arten spielt und dass die Vererbung von Eigenschaften durch Chromosomen und Gene gesteuert wird. Das Buch enth�����lt auch Diskussionen �����ber die Evolutionstheorie und die Bedeutung der sexuellen Fortpflanzung f�����r die Anpassung von Organismen an ihre Umgebung. Amphimixis oder: Die Vermischung der Individuen ist ein wichtiger Beitrag zur modernen Biologie und hat einen gro�����en Einfluss auf die Entwicklung der Genetik und der Evolutionsbiologie gehabt.This Book Is In German.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

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. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ Die Metamorphose Der Corethra Plumicornis: Ein Weiterer Beitrag Zur Entwicklungsgeschichte Der Insecten August Weismann Engelmann, 1866 Science; Life Sciences; Zoology; Entomology; Science / Life Sciences / Zoology / Entomology

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.

Das Buch ""Die Continuitat Des Keimplasma's Als Grundlage Einer Theorie Der Vererbung"" wurde im Jahr 1885 von August Weismann ver������ffentlicht. Es handelt sich um eine bahnbrechende Arbeit, die eine neue Theorie der Vererbung vorstellt. Weismann argumentiert, dass die Keimzellen eines Organismus das Keimplasma enthalten, das die genetische Information f�����r die Weitergabe von Merkmalen von einer Generation zur n�����chsten enth�����lt. Diese Theorie der Kontinuit�����t des Keimplasmas bildet die Grundlage f�����r das Verst�����ndnis der Vererbung und hat einen gro�����en Einfluss auf die moderne Genetik. Das Buch enth�����lt auch eine detaillierte Diskussion �����ber die Rolle von Chromosomen und Zellteilung bei der Vererbung von Merkmalen. Weismann's Arbeit hat die Entwicklung der Genetik und Evolutionstheorie ma�����geblich beeinflusst und ist bis heute ein wichtiger Beitrag zur Wissenschaft.This Book Is In German.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

Neue Gedanken zur Vererbungsfrage eine Antwort an Herbert Spencer by August Weismann. This book is a reproduction of the original book published in 1895 and may have some imperfections such as marks or hand-written notes.

Das Buch ""Das Keimplasma: Eine Theorie Der Vererbung"" wurde 1892 von August Weismann ver������ffentlicht. Es ist ein bedeutendes Werk in der Geschichte der Biologie und besch�����ftigt sich mit der Vererbung von Merkmalen von einer Generation zur n�����chsten. Weismann entwickelt in diesem Buch seine Theorie des Keimplasmas, die besagt, dass die Vererbung von Merkmalen ausschlie�����lich �����ber die Keimbahn stattfindet und nicht �����ber den K������rper der Eltern weitergegeben werden kann. Diese Theorie hatte einen gro�����en Einfluss auf die Entwicklung der Genetik und der Evolutionstheorie. Das Buch ist in sechs Kapitel unterteilt und enth�����lt zahlreiche Illustrationen und Diagramme, um die Theorie zu veranschaulichen. Es ist ein wichtiger Beitrag zur wissenschaftlichen Literatur und ein Meilenstein in der Geschichte der Biologie.This Book Is In German.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

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.

The following paper was read at the meeting of the Association of German Naturalists at Salzburg, on September 21st, 1881; and it is here printed in essentially the same form. A somewhat longer discussion of a few points has been now intercalated; these were necessarily omitted from the lecture itself for the sake of brevity, and are, therefore, not contained in the account printed in the Proceedings of the fifty-fourth meeting of the Association. Further additions would not have been admissible without an essential change of form, and therefore I have not put into the text a note which ought otherwise to have been there, and which is now to be found in the Appendix, as Note 8. It fills up a gap which was left in the text, for the above-mentioned reason, by attempting to give an explanation of the normal death of cells of tissues-an explanation which is required if we are to maintain that unicellular organisms are so constituted as to be potentially immortal.

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. 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.

The present work by Professor Weismann, well known for his profound embryological investigations on the Diptera, will appear, I believe, to every naturalist extremely interesting and well deserving of careful study. Any one looking at the longitudinal and oblique stripes, often of various and bright colours, on the caterpillars of Sphinx-moths, would naturally be inclined to doubt whether these could be of the least use to the insect; in the olden time they would have been called freaks of Nature. But the present book shows that in most cases the colouring can hardly fail to be of high importance as a protection. This indeed was proved experimentally in one of the most curious instances described, in which the thickened anterior end of the caterpillar bears two large ocelli or eye-like spots, which give to the creature so formidable an appearance that birds were frightened away. But the mere explanation of the colouring of these caterpillars is but a very small part of the merit of the work. This mainly consists in the light thrown on thevi laws of variation and of inheritance by the facts given and discussed. There is also a valuable discussion on classification, as founded on characters displayed at different ages by animals belonging to the same group. Several distinguished naturalists maintain with much confidence that organic beings tend to vary and to rise in the scale, independently of the conditions to which they and their progenitors have been exposed; whilst others maintain that all variation is due to such exposure, though the manner in which the environment acts is as yet quite unknown. This edition has no illustrations.

Ueber den Einfluss der Isolirung auf die Artbildung by August Weismann. This book is a reproduction of the original book published in 1872 and may have some imperfections such as marks or hand-written notes.