More about how evolution works; stasis (Evolution)

by David Turell , Tuesday, October 13, 2015, 22:25 (3327 days ago) @ David Turell

Many species remain the same for hundreds of millions of years. We do know complex organisms become more complex, but stasis and punctuated equilibrium are present also:-http://www.evolutionnews.org/2015/10/stasis_when_lif100011.html-"An evolutionary biologist at the University of Oslo, Kjetil Lysne Voje, offers an explanation for stasis:-The most wide-spread explanation is stabilising selection. It suggests that the advantage for a species which is already well adapted to its environment will be to avoid changing much. It is a type of natural selection that favours the average individuals in a population because changes are disadvantageous. Changes are a drawback and stabilising selection will discard deviations from the well-functioning norm.-"'Stabilising selection is a very good explanation for stasis, as it helps a species remain unchanged. But it has some problems, as it is hard to conceive of an optimal form that would not change in the course of millions of years," says Voje."-Comment. Voje is struggling for an answer that sounds real. We know the Earth has had enormous changes as evidenced by hot periods ( palms in the Arctic), glacial periods, and continental drift, and so many species show no change. they arrive full-blown and disappear millions of years later looking the same, or are still here laughing at us because we do not understand the process of evolution