Dating and paypal
 Adaptation is genetically based and so leads to phenotypic changes that accumulate over time;  Speciation (species formation) evolves through reproductive isolation and (genetic) divergence of populations;  Genetic changes through natural selection lead to new species and eventually new taxa .
The evolution of a species is linked to the environment.
This formed the foundation of the neo-Darwinian evolutionary theory.
Very simply, there are five basic principles to this theory:  Variation has a genetic origin (i.e.
God first completed the physical and biological constitution of humanity.
Only after this, did God breathe his Spirit into Adam.
I have integrated this web page on human evolution into an electronic text, " Nature's Holism - Holism.
Archaeological geology as a science had to precede the proposal of evolution, as an understanding of the immense age of the earth is necessary to understand evolution.Mass extinction events and an organism's unique adaptations mark the history of evolution, both of which may lead to adaptive radiation.