I am interested in using BEAST to find the divergence time estimates of species separations within a genus of frogs. The genus separated from a outgroup taxon I have chosen around 80 million years ...
Polar bear for instance could as time was passing by continually lose his pigmentation. I'm looking for the most affecting phenotypic trait evolved (by any type of evolution) without mutation. Thanks. ...
My question is simple: why is all life organized in species having more or less peculiar features, and we don't observe a multitude of related descendants evolve seamlessly in a continuum of diverging ...