The Organization and Cell-Lineage of the Ascidian Egg (Classic Reprint)
Language: English
Published by Forgotten Books, 2018
- Softcover
- New
Seller: Forgotten Books, London, United KingdomForgotten Books
AbeBooks seller since June 2, 2021
Condition: New
£ 15.14
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Print on Demand. Delving into the origin and development of the ascidian egg, this book offers a detailed examination of the cell lineage and organization of this fascinating organism. The author, a renowned scientist, meticulously describes the maturation and fertilization processes, highlighting the unique movements of the egg's protoplasm and the formation of the yellow crescent, a crucial landmark in its development. Through meticulous observations and a wealth of illustrations, the book traces the early development of the ascidian embryo, providing valuable insights into the fundamental principles of cell division and differentiation. The author's groundbreaking research challenges established theories and sheds new light on the complexities of egg organization and the origins of embryonic structures. This book is an essential resource for developmental biologists, embryologists, and anyone seeking a deeper understanding of the intricate processes that govern the formation of life. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book.…
Seller Inventory # 9781332305292_0
- Title
- The Organization and Cell-Lineage of the Ascidian Egg (Classic Reprint)
- Author
- Edwin G. Conklin
- Publisher
- Forgotten Books
- Publication year
- 2018
- Condition
- New
- Book Type
- print-on-demand item
- Binding
- Paperback
- Language
- English
- ISBN 10
- 1332305296
- ISBN 13
- 9781332305292
- Seller catalogs
- Biology
A. Organization OF the egg. - Recent years have witnessed a revival of the ancient controversy as to the nature and contents of the germ cells. On the one hand are those who with Weismann maintain that the egg must contain the elements or determinants Of very many structures which will appear in the course of development; on the other hand are ranged the modern epigenesists who find in the egg cell only complex chemical substances which have the capacity under certain outer conditions Of undergoing regular transformations into other substances which incidentally have peculiar forms, just as crystals have.
But while this modern controversy recalls the ancient one between the adherents of evolution and those of epigenesis, it does so chiefly because it proceeds from the same temper of mind, and not because anyone today is ready to defend the Views of either the evolutionists or the epigenesists of a century ago. NO one now expects to find in the egg or sperm a predelineated germ with all adult parts present in miniature, neither can anyone now maintain that the egg is composed Of unorganized and non-living material. Everyone now admits that the truth is somewhere between these two extremes; the real problem is how much or how little Of organization is present, and not whether the germ is organized at all.
Though the controversy as to evolution and epigenesis has thus been nar rowed within relatively small limits, and has thereby lost much of its startling and picturesque character, it is none the less-a real and important controversy today. In general the attitude of physiologists and those who deal with the processes of development has ever been to place emphasis upon the epigenetic character of development and the extremely simple structure Of the germ; whereas those who are concerned chiefly with organic structures are prone to seek for antecedent structures in earlier and earlier stages of development and so finally in the unsegmented egg itself.
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.
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Forgotten Books
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Forgotten Books’ Classic Reprint Series utilizes the latest technology to regenerate facsimiles of historically important writings. Careful attention has been made to accurately preserve the original format of each page whilst digitally enhancing the quality of the aged text.
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Forgotten Books publishes hundreds of thousands of rare and classic books.
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.
This text has been digitally restored from a historical edition. Some errors may persist, however we consider it worth publishing due to the work's historical value.
The digital edition of all books may be viewed before purchase if you request a sample.
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