Lets review: Variances arise within a species. During fat times, all survive, so combinations of multiple mutations are possible. Genetic variations are base 4 digital and quantum.
During lean times, natural selection gives some species an advantage. Barriers permit some populations to evolve separately from others, even when they may be initially the same populations. For the Giraffe, the longer neck may have permitted expansion to forested areas.
For Humans the difference between 44 chromosomes for other great apes, and 43 chromosomes for Humans constitutes a significant barrier. Barriers can be geographical, chemical, or biological.
Most biologists say things like “may have permitted”. Journalists and even text book writers sometimes drop the weak suppositions. I would suggest that Science is something done in the field, or at universities (or institutions like the Page Museum, close to where I live). Education is something that is done in schools, with a text book. Propaganda is something that is done openly with a microphone, or silently with the censor’s pen or delete key.
Change "say" to "should say" and that was my entire point. I did not say all biologists are going crazy with suppositions.
Variances arise within a species. During fat times, all survive, so combinations of multiple mutations are possible...During lean times, natural selection gives some species an advantage. Barriers permit some populations to evolve separately from others, even when they may be initially the same populations.
I'm seeing no difference here from what I stated, other than that I hypothesized that some variations may be predisposed to occur in certain species. Those variations might or might not help survival.
It is hard to suppose how the Panda's restricted diet and less than efficient reproduction was ever a plus for survival, yet it is what it is, i.e. it survived. It might be rational to presume that bamboo was plentiful enough, and the reproduction plentiful enough, versus thinking about the Panda having any sort of advantage.