The Physical Basis of SocietyD. Appleton, 1916 - 406 من الصفحات |
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الصفحة ix
... animals and man by bacteria and plants . The fixing of nitrogen . The production of food . Complex series of interrelations in the animal world reaching from the lowest to highest forms . An- imal communities . Ecology . Mutual aid ...
... animals and man by bacteria and plants . The fixing of nitrogen . The production of food . Complex series of interrelations in the animal world reaching from the lowest to highest forms . An- imal communities . Ecology . Mutual aid ...
الصفحة x
... plants and animals . Discovery and cultivation of plants . Origin of cultivated plants . Development of new types . Domestication of animals . Relation of domestic animals to civilization . The be- ginnings of the care of fish , oysters ...
... plants and animals . Discovery and cultivation of plants . Origin of cultivated plants . Development of new types . Domestication of animals . Relation of domestic animals to civilization . The be- ginnings of the care of fish , oysters ...
الصفحة 14
... plants and animals . The construction of the substances we call proteids by the chlorophyll - holding plants takes place only in the light . The lower the temperature the greater the amount of light needed . The influence of light on ...
... plants and animals . The construction of the substances we call proteids by the chlorophyll - holding plants takes place only in the light . The lower the temperature the greater the amount of light needed . The influence of light on ...
الصفحة 15
... animals . Lizards and snakes gradually disappear along with the thick ... plants in our gardens into three groups : tender , half - hardy , hardy ... plants out - of - doors during our hot summers , but we do not change their ...
... animals . Lizards and snakes gradually disappear along with the thick ... plants in our gardens into three groups : tender , half - hardy , hardy ... plants out - of - doors during our hot summers , but we do not change their ...
الصفحة 21
... plants or animals causing disease and the types carry- ing the disease flourish . In Africa the sleeping sickness is carried by the tsetse fly inhabiting the banks of streams and ponds . Malaria disappears in the Middle West when the ...
... plants or animals causing disease and the types carry- ing the disease flourish . In Africa the sleeping sickness is carried by the tsetse fly inhabiting the banks of streams and ponds . Malaria disappears in the Middle West when the ...
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acre Africa America appeared Asia average bacteria beetles believe birds body breeding carbon carbon dioxid carnivora cattle cause cent century changes characters chromosomes civilization climate color considered crops cultivated Darwin death destroyed discovered discoveries disease early earth eggs elements elm-leaf beetle environment Europe European evidence evolution existence fact favorable feeble-minded female fish forms germ cells groups growth hence heredity Hessian fly human Ibid important Inasmuch inches increase individuals influence inheritance insects Kallikak Family killed known Lamarck large numbers larvæ less living lower malaria male man's mated natural selection nature normal organisms ovum oxygen parents physical plants and animals population possible produced race reason seeds smallpox social society soil species square mile substances survive temperature theory thought tion trees tropics tuberculosis United women yellow yellow fever