The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
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Page vi
... organ- isation - Low forms preserved - Convergence of Character- Indefinite multiplication of species - Summary • . 97 CHAPTER V. LAWS OF VARIATION . Effects of changed conditions - Use and disuse , combined with natural selection ; organs ...
... organ- isation - Low forms preserved - Convergence of Character- Indefinite multiplication of species - Summary • . 97 CHAPTER V. LAWS OF VARIATION . Effects of changed conditions - Use and disuse , combined with natural selection ; organs ...
Page vii
... Organs of small importance - Organs not in all cases absolutely perfect - The law of Unity of Type and of the Conditions of Existence embraced by the theory of Natu- ral Selection . • . 207 CHAPTER VII . MISCELLANEOUS OBJECTIONS TO THE ...
... Organs of small importance - Organs not in all cases absolutely perfect - The law of Unity of Type and of the Conditions of Existence embraced by the theory of Natu- ral Selection . • . 207 CHAPTER VII . MISCELLANEOUS OBJECTIONS TO THE ...
Page 10
... organs . With respect to what I have called the indirect ac- tion of changed conditions , namely , through the repro- ductive system being affected , we may infer that vari- ability is thus induced , partly from the fact of this system ...
... organs . With respect to what I have called the indirect ac- tion of changed conditions , namely , through the repro- ductive system being affected , we may infer that vari- ability is thus induced , partly from the fact of this system ...
Page 11
... organs are not easily affected ; so will some animals and plants withstand domestication or cultiva- tion , and vary very slightly - perhaps hardly more than in a state of nature . Some naturalists have maintained that all variations ...
... organs are not easily affected ; so will some animals and plants withstand domestication or cultiva- tion , and vary very slightly - perhaps hardly more than in a state of nature . Some naturalists have maintained that all variations ...
Page 13
... organs in other countries , is proba- bly another instance of the effects of use . Not one of our domestic animals can be named which has not in some country drooping ears ; and the view which has been suggested that the drooping is due ...
... organs in other countries , is proba- bly another instance of the effects of use . Not one of our domestic animals can be named which has not in some country drooping ears ; and the view which has been suggested that the drooping is due ...
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Common terms and phrases
adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellę larvę less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young