Darwiniana: EssaysD. Appleton, 1897 - 475페이지 |
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1 페이지
... races in the struggle for life . " To render this thesis intelligible , it is necessary to interpret its terms . In the first place , what is a species ? The question is a simple one , but the right answer to it is hard to find , even ...
... races in the struggle for life . " To render this thesis intelligible , it is necessary to interpret its terms . In the first place , what is a species ? The question is a simple one , but the right answer to it is hard to find , even ...
16 페이지
... races of animals and plants , have been produced by one method . The breeder - and a skilful one must be a person of much sagacity and natural or acquired perceptive faculty - notes some slight difference , arising he knows not how , in ...
... races of animals and plants , have been produced by one method . The breeder - and a skilful one must be a person of much sagacity and natural or acquired perceptive faculty - notes some slight difference , arising he knows not how , in ...
17 페이지
... 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 breeds of dogs , or of ...
... 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 breeds of dogs , or of ...
39 페이지
... race being established per saltum , but of that race breeding at once , and showing no mixed forms , even when crossed with another breed . " true " " By taking care to select Ancons of both sexes , for breeding from , it thus became ...
... race being established per saltum , but of that race breeding at once , and showing no mixed forms , even when crossed with another breed . " true " " By taking care to select Ancons of both sexes , for breeding from , it thus became ...
40 페이지
... race of six - fingered men , as Seth Wright's ram became a nation of Ancon sheep , though the tendency of the variety to perpetuate itself appears to have been fully as strong in the one case as in the other . And the reason of the ...
... race of six - fingered men , as Seth Wright's ram became a nation of Ancon sheep , though the tendency of the variety to perpetuate itself appears to have been fully as strong in the one case as in the other . And the reason of the ...
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adapted Agamogenesis Ancon animalcules animals animals and plants appear beds biological birds body bones called carbonic acid causes character Charles Darwin common course creation cross curious Darwin Darwin's views deposited direct doctrine of evolution domestic pigeons doubt endeavour epigenesis epoch Erasmus Darwin evidence ex nihilo experiments extinct fact favour forms fossil geological germ groups horse Hyæna hypothesis ichthyosaurus inorganic world inquiry kind knowledge Lamarck lectures less living male matter means mind Mivart modification natural selection naturalists observation offspring operation organic nature organisation Origin of Species parent peculiar perpetuation phenomena physiological pigeons Pikermi Pouter present primitive stock produced Quarterly Reviewer question races reason remarkable result Rock Pigeon scientific selective breeding sense sheep skeleton sort speculations spontaneous structure Suarez substance suppose Teleology tendency theory thing tion toes variation varieties vary vegetable whole