Essays Upon Heredity and Kindred Biological Problems; Volume 1
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This item is printed on demand. Paperback. 168 pages. Dimensions: 9.7in. x 7.4in. x 0.4in.This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: . . . of the sperm-mother-cell. See Douglas H. Campbell, Zur Entwicklungsgeschichte der Spermatozoiden in Berichte der deutschen botanischen Gesellschaft, vol. v, 1887, p. 12a. --S. S. in order to bring the nuclei destined for the sexual act into the physiological condition necessary for its due performance. I am unwilling to abandon the idea that the expulsion of the histogenetic parts of the nuclear substance, during the maturation of germ-cells, is also a general phenomenon in plants; for the process appears to be fundamental, while the argument that it has not been proved to occur universally is only of doubtful value. The embryo-sac of Angiosperms is such a complex structure that it seems to me to be possible (as it does to Strasburger) that processes which precede the formation of the egg-cell have borne relation to the sexual differentiation of the nucleus of the egg. Besides, it is possible that the vegetable egg-cell may, in certain cases, possess so simple a structure and so small a degree of histological specialization, that it would not be necessary for it to contain any specific histogenetic nucleoplasm: thus it would consist entirely of germ-plasm from the first. In such cases, of course, its maturation would not be accompanied by the expulsion of somatic nucleoplasm. I have hitherto abstained from discussing the question as to whether the process of the formation of polar bodies may require an interpretation which is entirely different from that which I have given it, whether it may receive a purely morphological interpretation. In former times it could only be regarded as of purely phyletic significance: it could only be looked upon as the last remnant of a process which formerly possessed some meaning, but which is now. . . This item ships from La Vergne,TN.

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Von Händler/Antiquariat, The Book Depository US [58762574], London, United Kingdom.
Language: English . Brand New Book ***** Print on Demand *****. This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1891 edition. Excerpt: .of the sperm-mother-cell. See Douglas H. Campbell, Zur Entwicklungsgeschichte der Spermatozoiden in Berichte der deutschen botanischen Gesellschaft, vol. v, 1887, p. 12a.--S. S. in order to bring the nuclei destined for the sexual act into the physiological condition necessary for its due performance. I am unwilling to abandon the idea that the expulsion of the histogenetic parts of the nuclear substance, during the maturation of germ-cells, is also a general phenomenon in plants; for the process appears to be fundamental, while the argument that it has not been proved to occur universally is only of doubtful value. The embryo-sac of Angiosperms is such a complex structure that it seems to me to be possible (as it does to Strasburger) that processes which precede the formation of the egg-cell have borne relation to the sexual differentiation of the nucleus of the egg. Besides, it is possible that the vegetable egg-cell may, in certain cases, possess so simple a structure and so small a degree of histological specialization, that it would not be necessary for it to contain any specific histogenetic nucleoplasm: thus it would consist entirely of germ-plasm from the first. In such cases, of course, its maturation would not be accompanied by the expulsion of somatic nucleoplasm. I have hitherto abstained from discussing the question as to whether the process of the formation of polar bodies may require an interpretation which is entirely different from that which I have given it, whether it may receive a purely morphological interpretation. In former times it could only be regarded as of purely phyletic significance: it could only be looked upon as the last remnant of a process which formerly possessed some meaning, but which is now.

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Edward Bagnall Poulton, August Weismann, Selmar Schöland, Books, Science and Nature, Essays Upon Heredity and Kindred Biological Problems, Volume 1, 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.

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August 1834-1914 Weismann, Edward Bagnall Sir 1856-1943 Poulton, S. (Selmar) b. 1860 Schönland, Books, History, Essays Upon Heredity and Kindred Biological Problems; Volume 1, Essays Upon Heredity and Kindred Biological Problems; Volume 1.

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August 1834-1914 Weismann, Edward Bagnall Sir 1856-1943 Poulton, S. (Selmar) b. 1860 Schönland, Books, History, Essays Upon Heredity and Kindred Biological Problems; Volume 1, Essays Upon Heredity and Kindred Biological Problems; Volume 1.

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Essays Upon Heredity and Kindred Biological Problems; Volume 1: Hardback: Wentworth Press: 9781362412380: 26 Aug 2016.

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Essays Upon Heredity and Kindred Biological Problems, Volume 1: Hardback: Sagwan Press: 9781296969431: 22 Aug 2015.

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Essays Upon Heredity and Kindred Biological Problems, Volume 1: Hardback: Palala Press: 9781357135683: 18 May 2016.

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