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 v
... genera in any country vary more than the species of the smaller genera― Many of the species of the larger genera resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges 45-62 ...
... genera in any country vary more than the species of the smaller genera― Many of the species of the larger genera resemble varieties in being very closely , but unequally , related to each other , and in having restricted ranges 45-62 ...
Page 6
... genera are lineal descendants of some other and generally extinct species , in the same manner as the acknowledged varieties of any one species are the descendants of that species . Furthermore , I am con- vinced that Natural Selection ...
... genera are lineal descendants of some other and generally extinct species , in the same manner as the acknowledged varieties of any one species are the descendants of that species . Furthermore , I am con- vinced that Natural Selection ...
Page 15
... genera- tions , the several races , for instance , of the cabbage , in very poor soil ( in which case , however , some effect would have to be attributed to the direct action of the poor soil ) , that they would to a large extent , or ...
... genera- tions , the several races , for instance , of the cabbage , in very poor soil ( in which case , however , some effect would have to be attributed to the direct action of the poor soil ) , that they would to a large extent , or ...
Page 16
... 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 often to 16 CHAP . I. VARIATION.
... 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 often to 16 CHAP . I. VARIATION.
Page 26
... genera- tions , for we know of no fact countenancing the belief that the child ever reverts to some one ancestor , removed by a greater number of generations . In a breed which has been crossed only once with some distinct breed , the ...
... genera- tions , for we know of no fact countenancing the belief that the child ever reverts to some one ancestor , removed by a greater number of generations . In a breed which has been crossed only once with some distinct breed , the ...
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Common terms and phrases
accumulated adapted affinities allied species America amount analogous ancient animals appear Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable 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 individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living male mammals manner Marsupials migration modification modified descendants mongrels natural selection naturalists nearly nest occasionally offspring organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor racter ranked reciprocal crosses remarked resemble rudimentary organs seeds Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely