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 164
... living creature is due to inheritance ; and consequently , though each being assuredly is well fitted for its place in nature , many structures have now no very close and direct relation to present habits of life . Thus , we can hardly ...
... living creature is due to inheritance ; and consequently , though each being assuredly is well fitted for its place in nature , many structures have now no very close and direct relation to present habits of life . Thus , we can hardly ...
Página 311
... living species . All fall into a few grand classes ; and this fact is at once explained on the principle of descent . The more ancient any form is , the more , as a general rule , it differs from living forms . But , as Buckland long ...
... living species . All fall into a few grand classes ; and this fact is at once explained on the principle of descent . The more ancient any form is , the more , as a general rule , it differs from living forms . But , as Buckland long ...
Página 444
... living species will transmit its unaltered likeness to a distant futurity . And of the species now living very few will transmit progeny of any kind to a far distant futurity ; for the manner in which all organic beings are grouped ...
... living species will transmit its unaltered likeness to a distant futurity . And of the species now living very few will transmit progeny of any kind to a far distant futurity ; for the manner in which all organic beings are grouped ...
Contenido
VARIATION UNDER NATURE | 30 |
STRUGGLE FOR EXISTENCE | 45 |
NATURAL SELECTION | 59 |
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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