Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its ApplicationsMacmillan, 1891 - Всего страниц: 494 |
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Стр. xiv
... faculty -- The origin of the musical and artistic faculties - Independent proof that these faculties have not been developed by natural selection - The inter- pretation of the facts - Concluding remarks 445-478 • INDEX . 479-494 LIST OF ...
... faculty -- The origin of the musical and artistic faculties - Independent proof that these faculties have not been developed by natural selection - The inter- pretation of the facts - Concluding remarks 445-478 • INDEX . 479-494 LIST OF ...
Стр. 81
... faculty . Yet more important is the fact that each part or organ varies to a considerable extent inde- pendently of other parts . Again , we have shown , by abundant evidence , that the variation that occurs is very large in amount ...
... faculty . Yet more important is the fact that each part or organ varies to a considerable extent inde- pendently of other parts . Again , we have shown , by abundant evidence , that the variation that occurs is very large in amount ...
Стр. 118
... faculty of giving these drenched feathers such a good shaking that flight is practicable a moment after leaving the water . Certainly the water - thrushes ( Seiurus ludovicianus , S. aurica- pillus , and S. noveboracensis ) have taken ...
... faculty of giving these drenched feathers such a good shaking that flight is practicable a moment after leaving the water . Certainly the water - thrushes ( Seiurus ludovicianus , S. aurica- pillus , and S. noveboracensis ) have taken ...
Стр. 143
... faculty that varies ; they can all be divided into a more effective and a less effective group - that is , into one that is more beneficial or less beneficial . If less size of body would be beneficial , then , as half the variations in ...
... faculty that varies ; they can all be divided into a more effective and a less effective group - that is , into one that is more beneficial or less beneficial . If less size of body would be beneficial , then , as half the variations in ...
Стр. 144
... faculty of such species , there is no variation . And even were such a case found it would prove nothing , so long as in numerous other species variation was shown to exist ; because we know that great numbers of species and groups ...
... faculty of such species , there is no variation . And even were such a case found it would prove nothing , so long as in numerous other species variation was shown to exist ; because we know that great numbers of species and groups ...
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abundant adapted adduced allied species America amount animals and plants appears birds breed brilliant butterflies carnivora cause characters climate closely allied colours of animals common conspicuous continued cross-fertilisation crossed curious Darwin dicotyledons distinct species domestic animals effects eggs enemies Eocene evidence extinct facts faculty favourable female fertile fertilised flowers genera genus geological groups habits hybrids illustration important increase individuals infertility inhabit insects intercrossing kind larvæ less living male mammalia mammals markings marsupials mimicry Miocene mode modified moths natural selection naturalists nests occur offspring organs Origin of Species peculiar pigeons Pliocene pollen portion possess probably produced Professor protectively coloured pupa races regions remarkable resemble seeds self-fertilisation Silurian similar South America specimens spots sterility structure struggle for existence supposed tail theory tints tion toes trees tropical usually variability variation varied varieties vegetation warning colours whole wild wings