Darwiniana: EssaysD. Appleton, 1901 - 475페이지 |
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43 페이지
... 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 methods of treating their pets , which have been ...
... 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 methods of treating their pets , which have been ...
67 페이지
... action , atrophied by inaction ; it is another physiological fact that modifications produced are transmissible to offspring . Change the actions of an animal , therefore , and you will change its structure , by increasing the ...
... action , atrophied by inaction ; it is another physiological fact that modifications produced are transmissible to offspring . Change the actions of an animal , therefore , and you will change its structure , by increasing the ...
71 페이지
... action which he performs in artificial selection . The evidence brought forward by Mr. Darwin in support of his hypothesis is of three kinds . First , he endeavours to prove that species may be originated by 34 II 71 THE ORIGIN OF SPECIES.
... action which he performs in artificial selection . The evidence brought forward by Mr. Darwin in support of his hypothesis is of three kinds . First , he endeavours to prove that species may be originated by 34 II 71 THE ORIGIN OF SPECIES.
87 페이지
... action of physical conditions ) may be viewed either as having been of special use to some ancestral form , or as being now of special use to the descendants of this form - either directly , or indirectly , through the complex laws of ...
... action of physical conditions ) may be viewed either as having been of special use to some ancestral form , or as being now of special use to the descendants of this form - either directly , or indirectly , through the complex laws of ...
102 페이지
... action , all the grains of sand below a certain size , and have heaped them by themselves over a great area . This sand has been " unconsciously selected " from amidst the gravel in which it first lay with as 102 CRITICISMS ON THE ...
... action , all the grains of sand below a certain size , and have heaped them by themselves over a great area . This sand has been " unconsciously selected " from amidst the gravel in which it first lay with as 102 CRITICISMS ON THE ...
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adapted admit Agamogenesis Ancon animalcules animals and plants appears believe 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 evidence ex nihilo exhibited existence extinct fact favour Flourens geological germ give rise groups horse Hyæna hypothesis inorganic world inquiry kind knowledge Lamarck laws less living Maillet male matter means Mivart modification natural selection naturalists objections observation offspring organic nature organisation Origin of Species ovum parent Paul de Longpré peculiar phenomena philosophical physiological pigeons present primitive stock principles produced Professor 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 variation varieties vegetabilia vegetable Wallace whole