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마지막 업데이트: 2018-02-13
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remarks on the 7th anniversary of the declaration of security in the americas margaret daly hayes phd february 10, 2011 what are the next steps in multidimensional security? cp/csh/inf 249/11
remarks on the 7th anniversary of the declaration of security in the americas margaret daly hayes phd february 10, 2011 what are the next steps in multidimensional security? cp/csh/inf 249/11
147. canines were the earliest domesticated animal, a process that started somewhere between 20,000 and 15,000 years ago, most likely when grey wolves began scavenging around human settlements. eventually the relationship became a mutual one, as we began employing dogs for hunting, guarding, and companionship. sheltered from the survival-of-the-fittest wilderness, those semi-domesticated dogs thrived even though they harboured deleterious genetic mutations - stumpy legs, for instance - that would have been weeded out in smaller wild populations. thousands of years later, breeders would seize on that diverse raw material when they began creating modern breeds. they tended to grab traits they desired from across multiple breeds - or tried to rapidly replicate mutations in the same one - in order to get the dog they wanted. they also favoured novelty, since the more distinct a line of dogs appeared, the more likely it was to garner official recognition as a new breed. (national geographic) a. some early partly domesticated dogs had char- acteristics that would likely have threatened their survival in the wild. b. domesticated dogs are the evolutionary consequence of early humans' need for companionship. dog breeders usually selected for those traits that would make for the most loyal companions. d. semi-domesticated dogs continued to evolve according to the theory of "survival of the fittest.
마지막 업데이트: 2021-03-08
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