Darwiniana: EssaysAppleton, 1894 - 475페이지 |
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vi 페이지
... give rise to varieties infertile with one another , the logical foundation of the theory of natural selection is incomplete . We still remain very much in the dark about the causes of variation ; the apparent inheritance of acquired ...
... give rise to varieties infertile with one another , the logical foundation of the theory of natural selection is incomplete . We still remain very much in the dark about the causes of variation ; the apparent inheritance of acquired ...
12 페이지
... given kind of animal or plant in such a manner as to give rise to another kind , which would be admitted by naturalists as a distinct species . Lamarck imagined that he had discovered this vera causa in the admitted facts that some ...
... given kind of animal or plant in such a manner as to give rise to another kind , which would be admitted by naturalists as a distinct species . Lamarck imagined that he had discovered this vera causa in the admitted facts that some ...
19 페이지
... give rise to a more competent variety ( C ) , this will take its place and become a new species ; and thus , by natural selection , the species B and C will be suc- cessively derived from A. That this most ingenious hypothesis enables ...
... give rise to a more competent variety ( C ) , this will take its place and become a new species ; and thus , by natural selection , the species B and C will be suc- cessively derived from A. That this most ingenious hypothesis enables ...
36 페이지
... give rise to the metamorphosis of stamens into petals , and so forth . But however they may have arisen , what especially interests us at present is , to remark that , once in existence , many varieties obey. 36 II THE ORIGIN OF SPECIES.
... give rise to the metamorphosis of stamens into petals , and so forth . But however they may have arisen , what especially interests us at present is , to remark that , once in existence , many varieties obey. 36 II THE ORIGIN OF SPECIES.
45 페이지
... give rise to hybrid offspring , the hybrids so produced are infertile when paired together . The horse and the ass , for instance , if so crossed , give rise to the mule , and there is no certain evidence of offspring ever having been ...
... give rise to hybrid offspring , the hybrids so produced are infertile when paired together . The horse and the ass , for instance , if so crossed , give rise to the mule , and there is no certain evidence of offspring ever having been ...
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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