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 308
... America or in Australia , the most skilful naturalist would hardly be able to say whether the present or the pleistocene inhabitants of Europe resembled most closely those of the southern hemisphere . So , again , several highly ...
... America or in Australia , the most skilful naturalist would hardly be able to say whether the present or the pleistocene inhabitants of Europe resembled most closely those of the southern hemisphere . So , again , several highly ...
Página 322
... America , have left behind them the sloth , armadillo , and anteater , as their degenerate descendants . This cannot for an instant be admitted . These huge animals have become wholly extinct , and have left no progeny . But in the ...
... America , have left behind them the sloth , armadillo , and anteater , as their degenerate descendants . This cannot for an instant be admitted . These huge animals have become wholly extinct , and have left no progeny . But in the ...
Página 327
... America south of lat . 35 ° with those north of 25 ° , which consequently are separated by a space of ten degrees of latitude , and are exposed to considerably different conditions ; yet they are incomparably more closely related to ...
... America south of lat . 35 ° with those north of 25 ° , which consequently are separated by a space of ten degrees of latitude , and are exposed to considerably different conditions ; yet they are incomparably more closely related to ...
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