Contributions to the Knowledge of the Life History of Pinus With Special Reference to Sporogenesis, the Development of the Gameto Phytes and Fertilization (Classic Reprint) PDF Download
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Author: Margaret Clay Ferguson
Publisher: Forgotten Books
ISBN: 9780484816533
Category : Science
Languages : en
Pages : 252
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Book Description
Excerpt from Contributions to the Knowledge of the Life History of Pinus With Special Reference to Sporogenesis, the Development of the Gameto Phytes and Fertilization The pro-embryo. Division of the two segmentation-nuclei The four segmentation-nuclei The development of cell-walls Later mitoses in the formation of the pro-embryo The fate within the egg of the smaller sperm-nucleus. 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.
Author: Margaret Clay Ferguson
Publisher: Forgotten Books
ISBN: 9780484816533
Category : Science
Languages : en
Pages : 252
Get Book Here
Book Description
Excerpt from Contributions to the Knowledge of the Life History of Pinus With Special Reference to Sporogenesis, the Development of the Gameto Phytes and Fertilization The pro-embryo. Division of the two segmentation-nuclei The four segmentation-nuclei The development of cell-walls Later mitoses in the formation of the pro-embryo The fate within the egg of the smaller sperm-nucleus. 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.
Author: R.R. Bowker Company
Publisher:
ISBN:
Category : Language Arts & Disciplines
Languages : en
Pages : 990
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Book Description
Author:
Publisher:
ISBN:
Category : Booksellers' catalogs
Languages : en
Pages : 962
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Book Description
Author: Margaret Clay Ferguson
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 264
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Book Description
Author: Margaret Clay Ferguson
Publisher:
ISBN:
Category : Pine
Languages : en
Pages : 0
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Book Description
Author: Margaret Clay Ferguson
Publisher:
ISBN: 9780461742664
Category :
Languages : en
Pages : 266
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Book Description
This is a reproduction of the original artefact. Generally these books are created from careful scans of the original. This allows us to preserve the book accurately and present it in the way the author intended. Since the original versions are generally quite old, there may occasionally be certain imperfections within these reproductions. We're happy to make these classics available again for future generations to enjoy!
Author: Giuseppe Fusco
Publisher: Cambridge University Press
ISBN: 1108499856
Category : Medical
Languages : en
Pages : 491
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Book Description
A look into the phenomena of sex and reproduction in all organisms, taking an innovative, unified and comprehensive approach.
Author: Margaret Clay Ferguson
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: David L. Mulcahy
Publisher: Springer
ISBN: 9781461386247
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
In Recognition of the Forgotten Generation D. L. MULCAHyl Pollen was long believed to serve primarily a single function, that of delivering male gametes to the egge A secondary and generally overlooked value of pollen is that it serves to block the transmission of many defective alleles and gene combinations into the next generation. This latter function comes about simply because pollen tubes carrying defective haploid genotypes frequently fail to complete growth through the entire length of the style. However, the beneficial consequences of this pollen selection are diluted by the fact that the same deleterious genotypes are often transmitted through the egg at strictly mendelian frequencies (Khush, 1973). Gene expression in the pollen might thus at least appear to be a phenomenon of trivial consequence. Indeed, Heslop-Harrison (1979) rightly termed the gametophytic portion of the angiosperm life cycle, the "forgotten generation." This neglect, however, came about despite subtle but constant indications that pollen is the site of intense gene activity and selection. For example, Mok and Peloquin (1975) demonstrated that relatively heterozygous diploid pollen shows heterotic characteristics whereas relatively homozygous diploid pOllen does not. This was proof positive that genes are expressed (that is, transcribed and translated) in the pollen. 1 Department of Botany, University of Massachusetts Amherst, MA 01003, USA viii However, the implications for pollen biology of even this recent and well known study were not widely recognized.
Author: J. Schulz-Schaeffer
Publisher: Springer Science & Business Media
ISBN: 1461260604
Category : Science
Languages : en
Pages : 453
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Book Description
Since 1961 the author has taught a course in Cytogenetics at Montana State University. Undergraduate and graduate stu dents of Biology, Chemistry, Microbiology, Animal and Range Science, Plant and Soil Science, Plant Pathology and Veterinary Science are enrolled. Therefore, the subject matter has been pre sented in an integrated way to correlate it with these diverse disciplines. This book has been prepared as a text for this course. The most recent Cytogenetics text was published in 1972, and rapidly developing research in this field makes a new one urgently needed. This book includes many aspects of Cytogenetics and related fields and is written for the college student as well as for the researcher. It is recommended that the student should have taken preparatory courses in Principles of Genetics and Cytol ogy. The content is more than is usually taught during one quar ter of an academic year, thus allowing an instructor to choose what he or she would like to present to a class. This approach also allows the researcher to obtain a broad exposure to this field of biology. References are generously supplied to stimulate orig inal reading on the subject and to give access to valuable sources. The detailed index is intended to be of special assistance to researchers.
