The Physical Basis of SocietyD.Appleton, 1928 - 526 من الصفحات |
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الصفحة 40
... individuals comprising each genera- tion almost identical with those of the distant past . Nature furnishes the environment and determines the conditions under which each type of life may live and reproduce and to these conditions the ...
... individuals comprising each genera- tion almost identical with those of the distant past . Nature furnishes the environment and determines the conditions under which each type of life may live and reproduce and to these conditions the ...
الصفحة 57
... individuals ; some will bear the change without being in any way affected by it , others will die , while others again will survive . " 20 Adaptation , then , is essential if the individual or the species is to survive . Yet the ...
... individuals ; some will bear the change without being in any way affected by it , others will die , while others again will survive . " 20 Adaptation , then , is essential if the individual or the species is to survive . Yet the ...
الصفحة 66
... individuals . In the dry interior the process is slower , and on the high plateaus it may take many years . Both in books and in conversation with inhabitants of tropical regions one finds practical unanimity as to this tropical inertia ...
... individuals . In the dry interior the process is slower , and on the high plateaus it may take many years . Both in books and in conversation with inhabitants of tropical regions one finds practical unanimity as to this tropical inertia ...
الصفحة 71
... individuals . The migrations of man depend on food supply , snowfall , and similar things as clearly as does the migration of birds . The Indians could not carry on long campaigns against the whites , far from their homes , because they ...
... individuals . The migrations of man depend on food supply , snowfall , and similar things as clearly as does the migration of birds . The Indians could not carry on long campaigns against the whites , far from their homes , because they ...
الصفحة 93
... individuals of one species in communities , such as the swarms of bees or herds of cattle , is of another order . The difficulty of getting away from our man - centered in- terpretations is again apparent . The bacteria producing the ...
... individuals of one species in communities , such as the swarms of bees or herds of cattle , is of another order . The difficulty of getting away from our man - centered in- terpretations is again apparent . The bacteria producing the ...
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acres Africa America appears areas Asia atoms average bacteria believe birds body carbon carbon dioxide cause cent century cephalic index changes characters chromosomes civilization climate color common copper crops cultivated culture danger Darwin death rate destroy disease domestic early earth eggs environment Europe European evidence fact feeble-minded females fish forms germ cells given heredity human Ibid important increase Indians individual inheritance insane insects iron killed known land later light living male man's marriage metals miles natural selection nature Negro neolithic organisms ovum oxygen Pará rubber tree parasites physical population possible pounds present problems produced R. S. LULL race seeds seems social South South America species square mile supply T. H. MORGAN temperature things thousand tion to-day trees tropics types United wild woman women