Sentences with phrase «upon by natural selection»
The colony as a whole is acted upon by natural selection, making it an individual in the sense of the process of evolution.
http://creaturecast.org/ Not exact matches
No, Darwin's evolution by natural selection was most certainly not based upon merely seeing some bacteria change in a petri dish, and leaping directly to humans and apes having common ancestors.
It is true that thunderstorms arise by spontaneous generation, and since they are incapable of sexual reproduction, natural selection can only act upon them by selecting individuals and not by acting upon the whole species.