Download e-book for kindle: Adaptation and Natural Selection by George Christopher Williams

By George Christopher Williams

ISBN-10: 0691026157

ISBN-13: 9780691026152

This is often my favourite booklet at the subject, and if you are studying this you then may still most likely get it.
It's no longer rather as obtainable as Richard Dawkins' books, yet i locate this e-book to be extra a extra whole and compelling learn than TSG or TBW.

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Example text

His thinking was quite different from Kimura's and amounts to an estimate of the proportion of untried alleles at each locus after a given period of time. The conclusion depends on estimates of mutation rate per generation, but with an average mutation rate of 10-6 there would be very little pos38 NATURAL SELECTION, ADAPTATION & PROGRESS sible progress remaining after 107 generations, or perhaps a thousand years in a protist population. Only a short time should be required to establish an equilibrium between the increase of information by natural selection and its destruction by random processes.

I doubt that many biologists subscribe to the view of evolution as a deterministic progression towards man, but there is widespread belief in some form of aesthetically acceptable progress as an inevitable outcome of organic evolution. In this chapter I will discuss some of the limitations of the process of natural selection and their bearing on some common suppositions, such as the inevitability of progress. The stress on limitations does not indicate any doubt on my part as to the importance of natural selection.

The depletion of browse is a harmful effect of the feeding activities of each member of a dense population of deer. If browse depletion were beneficial, I suspect that someone, sooner or later, would have spoken of the feeding behavior of deer as a mechanism for depleting browse. A statement of this sort should not be based merely on the evidence that the statistical effect of eating is beneficial; it should be based on an examination of the causal mechanisms to determine whether they cannot be adequately ex17 INTRODUCTION plained as individual adaptations for individual nourishment.

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Adaptation and Natural Selection by George Christopher Williams


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