Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its ApplicationsMacmillan and Company, 1889 - 494 páginas |
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Página x
... domestic animals - Domestic pigeons - Acclimatisation -Circumstances favourable to selection by man - Conditions favour- able to variation - Concluding remarks 83-101 } CHAPTER V NATURAL SELECTION BY VARIATION AND SURVIVAL OF THE ...
... domestic animals - Domestic pigeons - Acclimatisation -Circumstances favourable to selection by man - Conditions favour- able to variation - Concluding remarks 83-101 } CHAPTER V NATURAL SELECTION BY VARIATION AND SURVIVAL OF THE ...
Página 12
... domestic animals ; and they have thus become in many cases so different from the wild races from which they originally sprang as to be hardly recognisable as the same . It is therefore proved that if any particular kind of variation is ...
... domestic animals ; and they have thus become in many cases so different from the wild races from which they originally sprang as to be hardly recognisable as the same . It is therefore proved that if any particular kind of variation is ...
Página 66
... domestic animals belonging to this group , especially dogs , present extreme varieties not surpassed even by pigeons and poultry among birds , renders it almost certain that an equal amount of variability exists in the wild state ; and ...
... domestic animals belonging to this group , especially dogs , present extreme varieties not surpassed even by pigeons and poultry among birds , renders it almost certain that an equal amount of variability exists in the wild state ; and ...
Página 83
... DOMESTICATED ANIMALS AND CULTIVATED PLANTS The facts of variation and artificial selection - Proofs of the generality of variation - Variations of apples and melons - Variations of flowers- Variations of domestic animals - Domestic ...
... DOMESTICATED ANIMALS AND CULTIVATED PLANTS The facts of variation and artificial selection - Proofs of the generality of variation - Variations of apples and melons - Variations of flowers- Variations of domestic animals - Domestic ...
Página 85
... domestic animals and cultivated plants . Proofs of the Generality of Variation . Another very common error is , that variation is the exception , and rather a rare exception , and that it occurs only in one direction at a time — that is ...
... domestic animals and cultivated plants . Proofs of the Generality of Variation . Another very common error is , that variation is the exception , and rather a rare exception , and that it occurs only in one direction at a time — that is ...
Outras edições - Ver tudo
Darwinism: An Exposition of the Theory of Natural Selection, with Some of ... Alfred Russel Wallace Visualização integral - 1890 |
Darwinism: An Exposition of the Theory of Natural Selection, with Some of ... Alfred Russel Wallace Visualização integral - 1890 |
Darwinism: An Exposition of the Theory of Natural Selection ..., Volumes 1-2 Alfred Russel Wallace Visualização integral - 1889 |
Palavras e frases frequentes
abundant adapted adduced allied species America amount animals and plants appears birds breed brilliant butterflies cause characters climate closely allied colours of animals common concealment 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 important increase individuals infertility inhabit insects intercrossing kind larva 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 regions remarkable resemblance seeds self-fertilisation Silurian similar 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 Zealand