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A fascinating and detailed examination of the evolution-and occasional devolution-of sexuality in microorganisms and more complex forms of life. Margulis and Sagan trace sex from its inauspicious beginnings in bacteria threatened by ultraviolet radiation to its intimate relation with the origin of mitotic division of nucleated cells. The origin of meiotic sex through cannibalism followed by centriole reproductive tardiness and the connection of cell symbiosis to sex and differentiation are explored. "The authors have not only given us a new and exiting scenario for the evolution of sex, but have also provided us with critical ways in which we can test their hypotheses. . . . This is a stimulating book that is sure to invoke criticism and discussion; I strongly recommend it."-Symbiosis "The book is well organized and well written, leading the reader from one thought to another almost effortlessly. Background information is presented to aid those of us who are not experts in this field, and a glossary is appended. The book could be used at all levels of study, from interested undergraduates in general biology though postdoctoral students of genetics and evolution. I recommend this thought-provoking book to you for both your enjoyment and your enlightenment."-Richard W. Cheney, Jr., Journal of College Science Teaching "This book, undoubtedly controversial, is a thoughtful and original contribution to an important aspect of cellular biology."-John Langridge

An essential guide for every aspiring novelist!The thought of writing a full-length novel can be daunting. But in A Novel in a Year, Louise Doughty makes a seemingly vast and unconquerable task manageable by walking aspiring authors through the different aspects of writing technique in eminently accessible bite-size chunks. Here are fifty-two chapters offering useful advice on all the facets of writing and exercises designed to help writers of all levels develop confidence and style. Read a chapter a week, and by year's end, you will have accomplished your goal and made it to "the End." plank"? --from "Ruling Your World"" How can we go on living when things fall apart when we are overcome by pain, fear, and anxiety? Pema Chodron s answer to that question contains some spectacularly good news: there is a fundamental happiness readily available to each one of us, no matter how difficult things seem to be. To find it, according to traditional Buddhist teaching, we must learn to Origins of Sex : Three Billion Years of Genetic Recombination download epub stop running from suffering and instead actually learn to approach it fearlessly, compassionately, and with curiosity. This radical practice enables us to use all situations, even very painful ones, as means for discovering the truth and love that are utterly indestructible.

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Author: Lynn Margulis,Dorion Sagan
Number of Pages: 280 pages
Published Date: 10 Sep 1990
Publisher: Yale University Press
Publication Country: New Haven, United States
Language: English
ISBN: 9780300046199
Download Link: Click Here
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