Because variation (among entities at any level) provides the raw material on which evolution acts, this chapter sets the stage for later comparisons in the book by reviewing briefly the generation and maintenance of genetic variation in different kinds of organisms. While some sections of the text are controversial, for the most part the chapter is more factual and less speculative than those which follow.
KeywordsCodon Mold Proline Bacillus Streptomyces
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Suggested Additional Reading
- Buss, L.W. 1987. The evolution of individuality. Princeton Univ. Press, Princeton, N.J. The history of life as a transition between different units of selection.Google Scholar
- Dawkins, R. 1982. The extended phenotype. The gene as the unit of selection. Oxford Univ. Press, Oxford, U.K. A continuation of Dawkins’ stimulating examination, begun in The Selfish Gene, of the levels in the hierarchy of life at which natural selection acts. The focus is on “selfish genes” and not “selfish organisms”.Google Scholar
- Loomis, W.F. 1988. Four billion years: An essay on the evolution of genes and organisms. Sinauer, Sunderland, MA. The evolution of life, from prebiological chemistry through higher organisms, from a personal, speculative point of view.Google Scholar
- Michod, R.E. and B.R. Levin (eds.). 1988. The evolution of sex: An examination of current ideas. Sinauer, Sunderland, MA. The most stimulating recent collection of broadly based essays on the evolution of sex.Google Scholar