
doi: 10.1002/bies.20766
pmid: 18478528
AbstractThe theory of Punctuated Equilibria challenges the neo‐Darwinian tenet that evolution is a uniform process. Recently, an article by Hunt1 has found that directional change during the evolution of a lineage is relatively small (occurring only in 5% of 250 analyzed traits). Of those traits that were shown to follow a trend, size was more likely to show gradual changes, whereas shape changes were more random. Here, we provide a short view of the nature of evolutionary trends, showing that directional change within lineages and among clades provides valuable evolutionary information about the processes involved in their generation. BioEssays 30:521–525, 2008. © 2008 Wiley Periodicals, Inc.
Population Density, Models, Genetic, Genetic Drift, Morphogenesis, Animals, Body Size, Selection, Genetic, Biological Evolution
Population Density, Models, Genetic, Genetic Drift, Morphogenesis, Animals, Body Size, Selection, Genetic, Biological Evolution
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