Darwiniana: EssaysD. Appleton, 1901 - 475페이지 |
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19 페이지
... change in any degree , however slight , B may no longer be that form which is best adapted to with- stand their destructive , and profit by their sus- taining , influence ; in which case if it should give rise to a more competent ...
... change in any degree , however slight , B may no longer be that form which is best adapted to with- stand their destructive , and profit by their sus- taining , influence ; in which case if it should give rise to a more competent ...
29 페이지
... changes 1 [ When this sentence was written , it was generally believed that the original nucleus of the egg ( the germinal vesicle ) disappeared . 1893. ] so rapid , yet so steady and purposelike in their II 29 THE ORIGIN OF SPECIES.
... changes 1 [ When this sentence was written , it was generally believed that the original nucleus of the egg ( the germinal vesicle ) disappeared . 1893. ] so rapid , yet so steady and purposelike in their II 29 THE ORIGIN OF SPECIES.
36 페이지
... changes in physical conditions , as in climate , in food , or the like , did not take place and had nothing to do ... change colour , to increase or diminish the size of muscles , to modify constitution , and , among plants , to give ...
... changes in physical conditions , as in climate , in food , or the like , did not take place and had nothing to do ... change colour , to increase or diminish the size of muscles , to modify constitution , and , among plants , to give ...
43 페이지
... 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 housed ...
... 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 housed ...
48 페이지
... changes in the con- ditions of life are apparently favourable to the vigour and fertility of all organic beings . It is not surprising that the degree of difficulty in uniting two species , and the degree of sterility of their hybrid ...
... changes in the con- ditions of life are apparently favourable to the vigour and fertility of all organic beings . It is not surprising that the degree of difficulty in uniting two species , and the degree of sterility of their hybrid ...
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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