On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeEaston Press, 1976 - 470 páginas |
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Página xxvii
... give them to show that I have not been hasty in coming to a decision . My work is now ( 1859 ) nearly finished ; but as it will take me many more years to complete it , and as my health is far from strong , I have been urged to publish ...
... give them to show that I have not been hasty in coming to a decision . My work is now ( 1859 ) nearly finished ; but as it will take me many more years to complete it , and as my health is far from strong , I have been urged to publish ...
Página 58
... give it some advantage over a different set of competitors or enemies . It is good thus to try in imagination to give to any one species an advantage over another . Probably in no single instance should we know what to do . This ought ...
... give it some advantage over a different set of competitors or enemies . It is good thus to try in imagination to give to any one species an advantage over another . Probably in no single instance should we know what to do . This ought ...
Página 394
... give definitions by which each group could be distinguished , still a natural classification , or at least a natural arrangement , would be possible . We shall see this by turning to the diagram ; the letters , A to L , may represent ...
... give definitions by which each group could be distinguished , still a natural classification , or at least a natural arrangement , would be possible . We shall see this by turning to the diagram ; the letters , A to L , may represent ...
Contenido
VARIATION UNDER NATURE | 30 |
STRUGGLE FOR EXISTENCE | 45 |
NATURAL SELECTION | 59 |
Derechos de autor | |
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Términos y frases comunes
accumulated adapted admit affinities allied species America ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common progenitor continuous crossed crustaceans degree developed difficulty distinct species divergence doubt effects eggs embryo existing exterminated extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period gradations greater number groups of species habits Hence hybrids hybrids produced 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 offspring organisation organs Origin of Species parent peculiar perfect pigeons pistil plants pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds slight South America stamens sterility structure struggle successive supposed swimbladder theory variability variations varieties vary whilst whole wings young