It must be added that the advocates of the advantages of war are not entitled to claim this process of selective breeding as one of the advantages of war.
In all these and the like cases there has been a process of selective breeding, eliminating the soldierly stocks and leaving the others to breed the race.
Now, it is admitted on all hands that, at present, so far as experiments have gone, it has not been found possible to produce this complete physiological divergence by selective breeding.
I do not know that there is a single fact which would justify any one in saying that any degree of sterility has been observed between breeds absolutely known to have been produced by selective breeding from a common stock.
The next question, and it is an important one for us, is this: Is there any limit to the amount of variation from the primitive stock which can be produced by this process of selective breeding?
By selective breeding we can produce structural divergences as great as those of species, but we cannot produce equal physiological divergences.
Can we find any approximation to this in the different races known to be produced by selective breeding from a common stock?
To this category belongs the northern limit of the belt of selective breeding, which slants across the plain of the Pampas from the Sierra de Cordoba to the Parana.
The area of farming and of selective breeding on the Pampa, the sheep-area in Patagonia, and the timber belt on the Chaco, still make use of wagons; and goods are carried on the backs of mules in the Andean area.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "selective breeding" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
