...In other words, education must prove to beof survival value... 
Peter Nielsen 「The Black Man's Place in South Africa」
...The Pygmy people in the junglesrepresent to-day a small survival from the past, but a survival ofcurious interest, pushed aside by the torrent of conquest...
W.E.B. Du Bois 「The Negro」
...The disposition shown by the newborn young is clearly an innate behavioral pattern that undoubtedly has a direct relationship to survival...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Permanent springs inMeade County State Park perhaps account for the survival of anisolated colony there...
Henry S. Fitch 「Occurrence of the Garter Snake, Thamnophis sirtalis, in the Great Plains and Rocky Mountains」
...As regards birds, the survival of an English winteris an equally efficient test...
Douglas Dewar 「Birds of the Indian Hills」
...The Caribou “exemplify the survival of the fittest; none but theperfect are allowed to live and breed, hence their perfection...
Francis Harper 「The Barren Ground Caribou of Keewatin」
...Alarge mass of suchsizable parasites in the throat might easily become a serious obstacleto comfortable living or even to survival on the part of the host...
Francis Harper 「The Barren Ground Caribou of Keewatin」
...In fish, itis probably expressed by complete failure of many individuals tospawn, coupled with scant survival of young produced by the adultsthat do spawn...
James Everett Deacon 「Fish Populations, Following a Drought, in the Neosho and Marais des Cygnes Rivers of Kansas」
...Added to this were the hardships of the Indian life, which resulted in the survival only of the fittest and provided the foundation for a sturdy people...
Edward S. Curtis 「The North American Indian」
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