The Major Transitions in Evolution / Veliki prehodi v evoluciji

author: Eörs Szathmáry, Department of Plant Taxonomy and Ecology, Institute of Biology, Eötvös Loránd University
published: Nov. 9, 2009,   recorded: October 2009,   views: 4623


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Some major transitions in evolution (such as the origin of multicellular organisms or that of social animals) occurred a number of times, whereas others (the origin of the genetic code, or language) seem to have been unique events. One must be cautious with the word ‘unique’, however. Due to a lack of the ‘true’ phylogeny of all extinct and extant organisms, one can give it only an operational definition. If all the extant and fossil species, which possess traits arising from a particular transition, share a last common ancestor after that transition, then the transition is said to be unique. Obviously, it is quite possible that there had been independent “trials”, as it were, but we do not have comparative or fossil evidence for them.

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Reviews and comments:

Comment1 Cita, September 29, 2010 at 11:58 a.m.:

Veliko neutemeljenih spekulacij. Zakaj je Darwinova ideja zmotna? V spodnjem linku imate zelo zgoščeno (153) prikazana dejstva, ki popolnoma ovržejo darwinistične "just so stories".

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