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 3
... cause of variation . In one limited sense , as we shall here- after see , this may be true ; but it is preposterous to attribute to mere external conditions , the structure , for instance , of the woodpecker , with its feet , tail ...
... cause of variation . In one limited sense , as we shall here- after see , this may be true ; but it is preposterous to attribute to mere external conditions , the structure , for instance , of the woodpecker , with its feet , tail ...
Page 6
... that species . Furthermore , I am convinced that Natural Selection has been the most important , but not the exclusive , means of modification . 53 CHAPTER I. VARIATION UNDER DOMESTICATION . Causes of Variability - 6 INTRODUCTION .
... that species . Furthermore , I am convinced that Natural Selection has been the most important , but not the exclusive , means of modification . 53 CHAPTER I. VARIATION UNDER DOMESTICATION . Causes of Variability - 6 INTRODUCTION .
Page 7
... Causes of Variability - Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance - Character of Do- mestic Varieties - Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties ...
... Causes of Variability - Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance - Character of Do- mestic Varieties - Difficulty of distinguishing between Varieties and Species - Origin of Domestic Varieties ...
Page 8
... cause any great amount of variation ; and that , when the organisation has once begun to vary , it generally continues varying for many generations . No case is on record of a variable organism ceasing to vary under cultivation . Our ...
... cause any great amount of variation ; and that , when the organisation has once begun to vary , it generally continues varying for many generations . No case is on record of a variable organism ceasing to vary under cultivation . Our ...
Page 9
... cause ; and if the same cause were to act uniformly during a long series of gen- erations on many individuals , all probably would be modified in the same manner . Such facts as the com- plex and extraordinary out - growths which ...
... cause ; and if the same cause were to act uniformly during a long series of gen- erations on many individuals , all probably would be modified in the same manner . Such facts as the com- plex and extraordinary out - growths which ...
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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 lamellæ larvæ 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