Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its ApplicationsMacmillan, 1891 - Всего страниц: 494 |
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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