Evolution ... Is Opportunistic, Hence Unpredictable.

A Species Consists Of A Group Of Populations Which Replace Each Other Geographically Or Ecologically And Of Which The Neighboring Ones Integrate Or Hybridise Wherever They Are In Contact Or Which Are Potentially Capable Of Doing So (with One Or More Of The Populations) In Those Cases Where Contact Is Prevented By Geographical Or Ecological Barriers.

Indeed, I Was Unable To Find Any Evidence Whatsoever Of The Occurrence Of A Drastic Evolutionary Acceleration And Genetic Reconstruction In Widespread, Populous Species.

Two Forms Or Species Are Sympatric, If They Occur Together, That Is If Their Areas Of Distribution Overlap Or Coincide. Two Forms (or Species) Are Allapatric, If They Do Not Occur Together, That Is If They Exclude Each Other Geographically. The Term Allopatric Is Primarily Useful In Denoting Geographic Representatives.

It Is Curious How Often Erroneous Theories Have Had A Beneficial Effect For Particular Branches Of Science.

In Neither His Definition Nor The Examples Illustrating What Memes Are Does Dawkins Mention Anything That Would Distinguish Memes From Concepts.