On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, Volumen2D. Appleton, 1888 - 458 páginas |
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Página iv
... laws . " WHEWELL : Bridgewater Treatise . " The only distinct meaning of the word ' natural ' is stated , fixed , or settled ; since what is natural as much requires and presupposes an intel- ligent agent to render it so , i . e . , to ...
... laws . " WHEWELL : Bridgewater Treatise . " The only distinct meaning of the word ' natural ' is stated , fixed , or settled ; since what is natural as much requires and presupposes an intel- ligent agent to render it so , i . e . , to ...
Página vi
... LAWS OF VARIATION . Effects of changed conditions- Use and disuse , combined with natural selection ; organs of ... law of Unity of Type and of the Conditions of Existence embraced by the theory of Natural Selection 133-167 - CHAPTER VII ...
... LAWS OF VARIATION . Effects of changed conditions- Use and disuse , combined with natural selection ; organs of ... law of Unity of Type and of the Conditions of Existence embraced by the theory of Natural Selection 133-167 - CHAPTER VII ...
Página vii
... Laws governing the sterility of hybrids — Sterility not a special endowment , but incidental on other differences , not accumulated by natural selection - Causes of the sterility of first crosses and of hybrids - Parallelism between the ...
... Laws governing the sterility of hybrids — Sterility not a special endowment , but incidental on other differences , not accumulated by natural selection - Causes of the sterility of first crosses and of hybrids - Parallelism between the ...
Página ix
... laws of , explained by variations not supervening at an early age , and being inherited at a corresponding age RUDIMENTARY ORGANS ; their origin explained — Summary Page 363-403 - CHAPTER XV . . -- RECAPITULATION AND CONCLUSION ...
... laws of , explained by variations not supervening at an early age , and being inherited at a corresponding age RUDIMENTARY ORGANS ; their origin explained — Summary Page 363-403 - CHAPTER XV . . -- RECAPITULATION AND CONCLUSION ...
Página xiv
... law , and not of miraculous interposition . Lamarck seems to have been chiefly led to his conclusion on the gradual change of species , by the difficulty of distinguishing species and varieties , by the almost perfect gradation of forms ...
... law , and not of miraculous interposition . Lamarck seems to have been chiefly led to his conclusion on the gradual change of species , by the difficulty of distinguishing species and varieties , by the almost perfect gradation of forms ...
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Términos y frases comunes
adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend theory tion variability variations varieties vary whilst whole wings young