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 363
... island situated above 300 miles from a continent or great continental island ; and many islands situated at a much less distance are equally barren . The Falkland Islands , which are inhabited by a wolf - like fox , come nearest to an ...
... island situated above 300 miles from a continent or great continental island ; and many islands situated at a much less distance are equally barren . The Falkland Islands , which are inhabited by a wolf - like fox , come nearest to an ...
Página 364
... islands . Hence we have only to suppose that such wandering species have been modified in their new homes in relation to their new position , and we can understand the presence of endemic bats on oceanic islands , with the absence of ...
... islands . Hence we have only to suppose that such wandering species have been modified in their new homes in relation to their new position , and we can understand the presence of endemic bats on oceanic islands , with the absence of ...
Página 369
... island , did not spread quickly to the other islands . But the islands , though in sight of each other , are separated by deep arms of the sea , in most cases wider than the British Channel , and there is no reason to suppose that they ...
... island , did not spread quickly to the other islands . But the islands , though in sight of each other , are separated by deep arms of the sea , in most cases wider than the British Channel , and there is no reason to suppose that they ...
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