Conceptual Aspects of Megaevolution

A major innovation such as the origin of mitochondrial protein targeting typically involves the origins of scores of new genes probably about 100 in this case. Their complexity accounts for the uniqueness of major innovations. 

Haeckel s classic dictum ontogeny recapitulates phylogeny has many exceptions in the complex world of animal development because of interpolation of novel stages, secondary loss or modification of early stages, and 

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