On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
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Page 14
... naturalists , some of them personally unknown to me . I cannot , however , let this opportunity pass without expressing my deep obligations to Dr. Hooker , who for the last fifteen years has aided me in every possible way by his large ...
... naturalists , some of them personally unknown to me . I cannot , however , let this opportunity pass without expressing my deep obligations to Dr. Hooker , who for the last fifteen years has aided me in every possible way by his large ...
Page 15
... naturalists . From these considerations , I shall devote the first chapter of this Abstract to Variation under Domestication . We shall thus see that a large amount of hereditary modification is at least possible ; and , what is equally ...
... naturalists . From these considerations , I shall devote the first chapter of this Abstract to Variation under Domestication . We shall thus see that a large amount of hereditary modification is at least possible ; and , what is equally ...
Page 17
... naturalists enter- tain , and which I formerly entertained - namely , that each species has been independently created - is erro- neous . I am fully convinced that species are not im- mutable ; but that those belonging to what are ...
... naturalists enter- tain , and which I formerly entertained - namely , that each species has been independently created - is erro- neous . I am fully convinced that species are not im- mutable ; but that those belonging to what are ...
Page 25
... naturalists— namely , that our domestic varieties , when run wild , gradually but certainly revert in character to their aboriginal stocks . Hence [ it has been argued that no deductions can be drawn from domestic races to species in a ...
... naturalists— namely , that our domestic varieties , when run wild , gradually but certainly revert in character to their aboriginal stocks . Hence [ it has been argued that no deductions can be drawn from domestic races to species in a ...
Page 26
... naturalists differ widely in determining what characters are of generic value ; all such valuations being at present empirical . Moreover , on the view of the origin of genera which I shall presently give , we have no right to expect ...
... naturalists differ widely in determining what characters are of generic value ; all such valuations being at present empirical . Moreover , on the view of the origin of genera which I shall presently give , we have no right to expect ...
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Common terms and phrases
accumulated adapted affinities allied species America analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic existing exterminated extinct extremely facts favourable fertilised fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids hybrids produced important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ laws less living males mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally offspring organic organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary seeds sexual sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory variability variations varieties vary whole widely