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Author: Frederick Orpen Bower
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 762
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Author: Frederick Orpen Bower
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 762
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Book Description
Author: Frederick Orpen Bower
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 727
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Author: Frederic Orpen BOWER
Publisher:
ISBN:
Category : Cryptogams
Languages : en
Pages : 756
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Author: Bower (rederic Orfren.)
Publisher:
ISBN:
Category : Generations, Alternating
Languages : en
Pages : 739
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Author: Frederick O. Bower
Publisher:
ISBN:
Category :
Languages : en
Pages : 727
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Author: Frederick Orpen Bower
Publisher:
ISBN:
Category : Generations, Alternating
Languages : en
Pages : 727
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Author: Linda E. Graham
Publisher: Wiley
ISBN: 9780471615279
Category : Science
Languages : en
Pages : 304
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Book Description
A critical, synthetic and comprehensive account offering discussion of early environments, the history of thought on land plant origins, various approaches used to study early plant evolution and the characteristics of green algae. Includes new ideas regarding evolution, comparative studies of fossil plants and carbon availability. Features abundant illustrations and an extensive bibliography.
Author: Bower F O (Frederick Orpen 1855-1948
Publisher: Hardpress Publishing
ISBN: 9781314293791
Category :
Languages : en
Pages : 756
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Book Description
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.
Author: F. O. Bower
Publisher:
ISBN: 9781331524960
Category : Science
Languages : en
Pages : 752
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Excerpt from The Origin of a Land Flora: A Theory In the year 1874 apogamy was discovered in Ferns by Farlow: and in 1884 instances of apospory in Ferns were demonstrated before the Linnaean Society of Iyondon by Druery. These events stimulated a fresh enquiry into the nature and origin of Alternation in Archegoniatc Plants. My own observations on apospory confirmed my interest in this question: it seemed to me probable that some biological cause had determined the prevalence and constancy of the alternation, to which apogamy and apospory appear as occasional exceptions. The theory was entertained that the change of conditions involved in the invasion of the land by organisms originally aquatic had played a prominent part in the establishment of those alternating phases of the life-cycle which are so characteristic of Archegoniatc Plants. As early as 1889 I had already written several chapters of a treatise on this subject: but the necessary facts were found to be then so imperfectly known that the work was abandoned, and instead of a full discussion of the matter, the Biological Theory of Antithetic Alternation was briefly stated in a paper published in the Annals of Botany in 1890 (vol iv. p. 347). The main position of Celakovsky in discriminating between Homologous and Antithetic Alternation was adopted; but the latter type, as seen in Archegoniate Plants, was recognised as having been fixed and perpetuated in accordance with the adaptation of aquatic organisms to a I-and-Habit The Studies in the Morphology of Spore-producing Members were then entered upon as preliminary investigations to elucidate the facts requisite for a more full statement, and they were published in five parts, from 1894 to 1903. Meanwhile, in 1894 Strasburger contributed to the Meeting of the British Association in Oxford his paper on the "Periodic Reduction of Chromosomes." He brought together a wealth of facts establishing the cytological distinction of the alternating generations, and his theoretical position was virtually identical with that of my paper of four years earlier. 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: Edwin M. Smolin
Publisher:
ISBN:
Category :
Languages : en
Pages :
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