Darwiniana: EssaysAppleton, 1894 - 475페이지 |
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41 페이지
Essays Thomas Henry Huxley. same direction ; while , in the other , no race was evolved , because no such selection was exercised . A race is a propagated variety ; and as , by the laws of reproduction , offspring tend to assume the ...
Essays Thomas Henry Huxley. same direction ; while , in the other , no race was evolved , because no such selection was exercised . A race is a propagated variety ; and as , by the laws of reproduction , offspring tend to assume the ...
42 페이지
... race , once produced , is no more a fixed and immutable entity than the stock whence it sprang ; variations arise among its members , and as these variations are transmitted like any others , new races may be developed out of the pre ...
... race , once produced , is no more a fixed and immutable entity than the stock whence it sprang ; variations arise among its members , and as these variations are transmitted like any others , new races may be developed out of the pre ...
43 페이지
... races can be shown to have been originated by the action of changes in what are commonly called external circumstances , upon the wild rock - pigeon . On the contrary , from time immemorial pigeon - fanciers have had essentially similar ...
... races can be shown to have been originated by the action of changes in what are commonly called external circumstances , upon the wild rock - pigeon . On the contrary , from time immemorial pigeon - fanciers have had essentially similar ...
44 페이지
... races occur in Nature , how are we to know whether any apparently distinct animals are really of different ... races , as compared with the results of crossing species . So far as the evidence goes at present , in- dividuals , of what ...
... races occur in Nature , how are we to know whether any apparently distinct animals are really of different ... races , as compared with the results of crossing species . So far as the evidence goes at present , in- dividuals , of what ...
45 페이지
... races and not species . If , on the other hand , no result ensues , or if the offspring are infertile with others produced in the same way , they are true physiological species . The test would be an admirable one , if , in the first ...
... races and not species . If , on the other hand , no result ensues , or if the offspring are infertile with others produced in the same way , they are true physiological species . The test would be an admirable one , if , in the first ...
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action adapted admit Agamogenesis Ancon animalcules animals animals and plants appears biology birds body called causes character Charles Darwin course creation Crustacea Darwin Darwin's views Darwinian deposited direct doctrine of evolution doubt Dysteleology endeavour epigenesis epoch Erasmus Darwin essay evidence ex nihilo exhibited existence extinct fact favour Flourens geological germ give rise groups horse Hyæna hypothesis inorganic world inquiry kind knowledge Lamarck laws lectures less living Maillet male matter means ment Mivart modification natural selection naturalists objections observation offspring organic nature organisation Origin of Species ovum parent peculiar phenomena philosophical physiological pigeons present primitive stock principles produced Quarterly Reviewer question races reason remarkable result scientific selective breeding sensations sense special creation speculations structure Suarez substantial forms suppose Teleology tendency theory thing thought tion toes truth variation varieties vegetabilia vegetable vera causa Wallace whole