This is a first hand account of the discussions that are going on between biologists of different persuasions.On the one side are the ultradarwinians, whose ranks include Richard Dawkins and George C Williams.They emphasise the supremacy of the gene and of natural selection.The other side is a more diverse group,the self styled naturalists,who focus on whole creatures rather than genesand who think in terms of complex interacting ecological processes.
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Paperback. Etat : Fair. 244 pages. cover worn & creased, some staining first few pages, bumpedAn insider's provocative account of one of the most contentious debates in sc ience todayWhen Niles Eldredge and Stephen Jay Gould, two of the world's leading evolutionary theorists, proposed a bold new theory of evolution--the theory of punctuated equilibria--they stood the standard interpretation of Darwin on its head. They also ignited a furious debate about the true nature of evolution.On the one side are the geneticists. They contend that evolution proceeds slowly bu t surely, driven by competition among organisms to transmit their genes from gen eration to generation. On the other are the paleontologists, like Eldredge and G ould, who show in the fossil record that in fact evolution proceeds only sporadi cally. Long periods of no change--equilibria--are punctuated by episodes of ra pid evolutionary activity. According to the paleontologists, this pattern shows that evolution is driven far more by environmental forces than by genetic compet ition.How can the prevailing views on evolution be so different? In Reinventing Darwin, Niles Eldredge offers a spirited account of the dispute and an impressiv e case for the paleontologists' side of the story. With the mastery that only a leading contributor to the debate can provide, he charts the course of theory fr om Darwin's day to the present and explores the fundamental mysteries and crucia l questions that underlie the current quarrels.Is evolution fired by a gentle an d persistent motor and fueled by the survival instincts of selfish genes? Or d oes it proceed in fits and starts, as the fossil record seems to show? What is t he role of environmental changes such as habitat destruction and of cataclysmic events like meteor impacts? Are most species inherently stable, changing only ve. N° de réf. du vendeur 5278ab
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