Darwiniana: EssaysAppleton, 1894 - 475페이지 |
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4 페이지
... cross the Primrose and the Cowslip , succeeded only once or twice in several years ; and yet it is a well- established fact that the Primrose and the Cow- slip are only varieties of the same kind of plant . Again , such cases as the ...
... cross the Primrose and the Cowslip , succeeded only once or twice in several years ; and yet it is a well- established fact that the Primrose and the Cow- slip are only varieties of the same kind of plant . Again , such cases as the ...
17 페이지
... crosses to interfere - a race may be formed , the tendency of which to reproduce itself is exceedingly strong ; nor is the limit to the amount of divergence which may be thus produced known ; but one thing is certain , that , if certain ...
... crosses to interfere - a race may be formed , the tendency of which to reproduce itself is exceedingly strong ; nor is the limit to the amount of divergence which may be thus produced known ; but one thing is certain , that , if certain ...
46 페이지
... crosses are of no value ; and the antipathy of wild animals of different species for one another , or even of wild and tame members of the same species , is ordinarily so great , that it is hopeless to look for such unions in Nature ...
... crosses are of no value ; and the antipathy of wild animals of different species for one another , or even of wild and tame members of the same species , is ordinarily so great , that it is hopeless to look for such unions in Nature ...
47 페이지
... cross them in the reverse way , would , with equal justice , according to the rule , pronounce them to be mere races ... crosses seems to bear no relation to the structural resemblances or differences of the members of any two groups ...
... cross them in the reverse way , would , with equal justice , according to the rule , pronounce them to be mere races ... crosses seems to bear no relation to the structural resemblances or differences of the members of any two groups ...
48 페이지
... cross , and in the hybrid produced from this cross . " In the same manner as in grafting trees , the capacity of one species or variety to take on another is incidental on generally unknown differences in their vegetative systems ; so ...
... cross , and in the hybrid produced from this cross . " In the same manner as in grafting trees , the capacity of one species or variety to take on another is incidental on generally unknown differences in their vegetative systems ; so ...
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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