The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeJohn Murray, Albemarle Street., 1891 - 432페이지 |
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xiv 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 afterwards : 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 afterwards : he has pointedly remarked ( Goethe als Naturforscher , ' von Dr ...
xviii 페이지
... doubt the type - form , " & c . ( Ibid . vol . i . p . xxxv . ) , that Professor Owen admitted that natural selection may have done something in the formation of a new species ; but this it appears ( Ibid . vol . iii . p . 798 ) is ...
... doubt the type - form , " & c . ( Ibid . vol . i . p . xxxv . ) , that Professor Owen admitted that natural selection may have done something in the formation of a new species ; but this it appears ( Ibid . vol . iii . p . 798 ) is ...
2 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 arrived , with a few facts in illustration , but which , I ...
... 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 arrived , with a few facts in illustration , but which , I ...
4 페이지
... doubt , after the most deliberate study and dis- passionate judgment of which I am capable , that the view which most naturalists until recently entertained , and which I formerly entertained - namely , that each species has been ...
... doubt , after the most deliberate study and dis- passionate judgment of which I am capable , that the view which most naturalists until recently entertained , and which I formerly entertained - namely , that each species has been ...
6 페이지
... doubt about many slight changes , -such as size from the amount of food , colour from the nature of the food , thickness of the skin and hair from climate , etc. Each of the endless variations which we see in the plumage of our fowls ...
... doubt about many slight changes , -such as size from the amount of food , colour from the nature of the food , thickness of the skin and hair from climate , etc. Each of the endless variations which we see in the plumage of our fowls ...
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accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely facts favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young