I'm asking for the biological MECCHANISM for change. This was a change of a phenotype.....biological changes call for a biological mechanism. I'm asking you what it is called. Feel free to scour the internet. S
p.s. ...oh, what the heck.... I'll go ahead and tell you...it's called phenotypic plasticity. If you can somehow weave that into neo-darwinism then I would like to read how.