I suggest that the true source of macroevolutionary change lies in the non-linear, or chaotic, dynamics of the relationship between genotype and phenotype — the actual organism and all its traits. (newscientist.com)
Similarly, there is no known intrinsic biological limit to the ability of adaptive microevolutionary change to continually and indefinitely modify, over sufficient lengths of time, the gross morphology of any particular form, i.e. observable macroevolutionary change up through the higher taxonomic levels. (religion.blogs.cnn.com)
(Please note: when I speak about evolution, I'm referring to Darwin's macroevolutionary theory: life began millions of years ago from a kind of primordial ooze that gave rise to single - celled creatures, which then evolved into more complex ones, all the way up to we humans.) (relevantmagazine.com)