The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeJohn Murray, Albemarle Street., 1891 - 432페이지 |
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xxi 페이지
... admits the truth of the descent and modification of species , and supports this doctrine by many original observations . The first edition of this work was published on November 24th , 1859 , and the second edition on January 7th , 1860 ...
... admits the truth of the descent and modification of species , and supports this doctrine by many original observations . The first edition of this work was published on November 24th , 1859 , and the second edition on January 7th , 1860 ...
14 페이지
... admit that many domestic breeds must have originated in Europe ; from whence otherwise could they have been derived ? So it is in India . Even in the case of the breeds of the domestic dog throughout the world , which I admit are ...
... admit that many domestic breeds must have originated in Europe ; from whence otherwise could they have been derived ? So it is in India . Even in the case of the breeds of the domestic dog throughout the world , which I admit are ...
20 페이지
... admit that many of our domestic races are descended from the same parents - may they not learn a lesson of caution , when they deride the idea of species in a state of nature being lineal descendants of other species ? Principles of ...
... admit that many of our domestic races are descended from the same parents - may they not learn a lesson of caution , when they deride the idea of species in a state of nature being lineal descendants of other species ? Principles of ...
37 페이지
... each other , as do the four or five provisionally admitted species which closely surround the typical Quercus robur . Finally , De Candolle admits that out of the 300 species , which will. CHAP . II . ] 37 DOUBTFUL SPECIES .
... each other , as do the four or five provisionally admitted species which closely surround the typical Quercus robur . Finally , De Candolle admits that out of the 300 species , which will. CHAP . II . ] 37 DOUBTFUL SPECIES .
38 페이지
Or the Preservation of Favoured Races in the Struggle for Life Charles Darwin. admits that out of the 300 species ... admitting much variation , -and the truth of this admission will often be disputed by other naturalists . When he ...
Or the Preservation of Favoured Races in the Struggle for Life Charles Darwin. admits that out of the 300 species ... admitting much variation , -and the truth of this admission will often be disputed by other naturalists . When he ...
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accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely facts favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase 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 resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young