The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for LifeP.F. Collier & son, 1902 - 356페이지 |
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13 페이지
... doubt that Goethe was an extreme partisan of similar views , as shown in the Introduction to a work written in 1794 and 1795 , but not published till long afterward : he has pointedly remarked ( " Goethe als Naturforscher , " von Dr ...
... doubt that Goethe was an extreme partisan of similar views , as shown in the Introduction to a work written in 1794 and 1795 , but not published till long afterward : he has pointedly remarked ( " Goethe als Naturforscher , " von Dr ...
19 페이지
... doubt the type - form , " etc. ( Ibid . vol . i . page xxxv . ) , that Professor Owen ad- mitted that natural selection may have done something in the formation of a new species ; but this it appears ( Ibid . vol . iii . page 798 ) is ...
... doubt the type - form , " etc. ( Ibid . vol . i . page xxxv . ) , that Professor Owen ad- mitted that natural selection may have done something in the formation of a new species ; but this it appears ( Ibid . vol . iii . page 798 ) is ...
23 페이지
... doubt- ful how far he extends his views on the modification of species . The " Philosophy of Creation " has been treated in a masterly manner by the Rev. Baden Powell , in his " Essays on the Unity of Worlds , " 1855. Nothing can be ...
... doubt- ful how far he extends his views on the modification of species . The " Philosophy of Creation " has been treated in a masterly manner by the Rev. Baden Powell , in his " Essays on the Unity of Worlds , " 1855. Nothing can be ...
26 페이지
... doubt errors will have crept in , though I hope I have always been cautious in trusting to good authorities alone . I can here give only the general conclusions at which I have ar- rived , with a few facts in illustration , but which ...
... doubt errors will have crept in , though I hope I have always been cautious in trusting to good authorities alone . I can here give only the general conclusions at which I have ar- rived , with a few facts in illustration , but which ...
32 페이지
... doubt about many slight changes- such as size from the amount of food , color from the nature of the food , thickness of the skin and hair from Grath Sni 1 / cture of Conditions climate , etc. Each of the endless variations which we 32 ...
... doubt about many slight changes- such as size from the amount of food , color from the nature of the food , thickness of the skin and hair from Grath Sni 1 / cture of Conditions climate , etc. Each of the endless variations which we 32 ...
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adapted admit affinities allied species America analogous ancient animals appear beak become bees believe belonging birds breeds cause cells characters climate closely allied color common continent crossed crustaceans degree developed difficulty distinct species domestic doubt eggs embryo existing extinct extremely facts favorable fertility flowers formation forms fossil Fritz Müller genera genus geological Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner marsupial migration modification modified descendants natural selection naturalists nearly nest offspring organs ORIGIN OF SPECIES paleozoic parent peculiar perfect pigeon pistil plants pollen present principle probably produced progenitor quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder theory tion trees variability variations varieties vary whole wings young