The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1898 |
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Página vi
... parent - Ex- plains the grouping of all organic beings - Advance in organ- isation - Low forms preserved - Convergence of Character- Indefinite multiplication of species - Summary CHAPTER V. LAWS OF VARIATION . . 97 Effects of changed ...
... parent - Ex- plains the grouping of all organic beings - Advance in organ- isation - Low forms preserved - Convergence of Character- Indefinite multiplication of species - Summary CHAPTER V. LAWS OF VARIATION . . 97 Effects of changed ...
Página xxv
... parent - form . In June , 1859 , Professor Huxley gave a lecture be- fore the Royal Institution on the Persistent Types of Animal Life . ' Referring to such cases , he remarks , " It is difficult to comprehend the meaning of such facts ...
... parent - form . In June , 1859 , Professor Huxley gave a lecture be- fore the Royal Institution on the Persistent Types of Animal Life . ' Referring to such cases , he remarks , " It is difficult to comprehend the meaning of such facts ...
Página 7
... somewhat differ- ent from , those to which the parent species had been exposed under nature . There is , also , some probability in the view propounded by Andrew Knight , that this. 3 CHAP . I. ] VARIATION UNDER DOMESTICATION . 7.
... somewhat differ- ent from , those to which the parent species had been exposed under nature . There is , also , some probability in the view propounded by Andrew Knight , that this. 3 CHAP . I. ] VARIATION UNDER DOMESTICATION . 7.
Página 9
... parent or from some more remote ancestor . Even strongly - marked differences occasionally appear in the young of the same litter , and in seedlings from the same seed - capsule . At long intervals of time , out of millions of ...
... parent or from some more remote ancestor . Even strongly - marked differences occasionally appear in the young of the same litter , and in seedlings from the same seed - capsule . At long intervals of time , out of millions of ...
Página 11
... parents . I may add , that as some organisms breed freely under the most unnatural conditions ( for instance , rabbits and ferrets kept in hutches ) , showing that their reproductive organs are not easily affected ; so will some animals ...
... parents . I may add , that as some organisms breed freely under the most unnatural conditions ( for instance , rabbits and ferrets kept in hutches ) , showing that their reproductive organs are not easily affected ; so will some animals ...
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Términos y frases comunes
adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree descendants developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young