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 186
... resemblance is often wonderfully close , and is not confined to colour , but extends to form , and even to the manner in which the insects hold themselves . The caterpillars which project motionless like dead twigs from the bushes on ...
... resemblance is often wonderfully close , and is not confined to colour , but extends to form , and even to the manner in which the insects hold themselves . The caterpillars which project motionless like dead twigs from the bushes on ...
Página 187
... resemblance is necessary for the first start , we can understand how it is that the larger and higher animals do not ( with the exception , as far as I know , of one fish ) resemble for the sake of protection special objects , but only ...
... resemblance is necessary for the first start , we can understand how it is that the larger and higher animals do not ( with the exception , as far as I know , of one fish ) resemble for the sake of protection special objects , but only ...
Página 391
... resemblance to a flourishing and little - persecuted kind , has a better chance of escaping destruction from predaceous birds and insects , and is consequently oftener preserved ; " the less perfect degrees of resemblance being ...
... resemblance to a flourishing and little - persecuted kind , has a better chance of escaping destruction from predaceous birds and insects , and is consequently oftener preserved ; " the less perfect degrees of resemblance being ...
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