An inventive mechanism: A DNA 'Shapiro change' (Evolution)

by David Turell , Tuesday, November 29, 2016, 19:37 (2914 days ago) @ dhw

David's comment: This modification is just what Shapiro has championed. A dramatic editing of DNA removing the metabolic stress of producing enzymes by finding a simpler way of manufacturing photosynthesis products. Still the same species! Doesn't show how speciation occurs and is no support for Darwin's original thesis.

dhw: There are three points here that we have discussed over and over again. Firstly, NOBODY knows how speciation occurred, and that is why we theorize. Secondly, what part of Darwin’s original thesis are you talking about? Common descent? Natural selection?

I accept common descent, but I remain doubtful about the importance of natural selection. It becomes active only when presented with alternative organisms, so it is basically passive in advancing evolution. Survival of the fittest is a tautology, and worthless. Survival is not dog eat dog, but is the environment friendly enough for survival, the 'bad luck' theory? Is nature balanced or not?

dhw: Or the same old random mutations plus gradualism that you and I have long since agreed to discount? Thirdly, it is not only such modifications that Shapiro has championed, but also the all-important factor of cellular intelligence, which means that “Where’s there a will there’s a way” is to be taken literally. Please give us your “theological explanation” for Prochlorococcus’s amazing talent.

I think God gave unicellular organisms the ability to edit their DNA for adaptations to changes in environment, but not to the degree of actual speciation, in agreement with what Shapiro presents.