Felix wrote: ↑August 13th, 2019, 10:10 amI try to be concise which means sometimes I omit what I'd have been better to include.I wrote no such thing, Felix.Gee whiz, folks are getting a bit testy around here... I was just riffing on your "struggle for existence" comment, Belindi.
By 'struggle for existence' I mean the struggle to get fed, raise offspring, get shelter from the storms, drive off competitors and so forth.Those individuals who manage to survive until they reproduce are the ones whose genes will survive until they themselves produce offspring, all else being equal e.g. no massive earthquakes , meteors , etc. If I remember rightly this is what Darwin himself meant by 'struggle for existence'.
I did mention vast time scales , 'geological' time scales,so that minute genetic variations will or will not increase exponentially.
BTW does "riffing" mean you were joking ? If so I'm either too old or too foreign or both to know the expression apart from what people do when playing popular guitar music.