Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its ApplicationsMacmillan and Company, 1889 - 494 páginas |
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Página xii
... groups - Its explanation — Extension of the principle — Mimicry in other orders of insects - Mimicry among the vertebrata - Snakes - The rattlesnake and the cobra - Mimicry among birds - Objections to the theory of mimicry -Concluding ...
... groups - Its explanation — Extension of the principle — Mimicry in other orders of insects - Mimicry among the vertebrata - Snakes - The rattlesnake and the cobra - Mimicry among birds - Objections to the theory of mimicry -Concluding ...
Página 8
... groups . termed Classes and Sub - kingdoms may be accounted for in the same way is a much more difficult question . The differ- ences which separate the mammals , birds , reptiles , and fishes from each other , though vast , yet seem of ...
... groups . termed Classes and Sub - kingdoms may be accounted for in the same way is a much more difficult question . The differ- ences which separate the mammals , birds , reptiles , and fishes from each other , though vast , yet seem of ...
Página 9
... groups as well as to the species of a genus , and not even Mr. Darwin's severest critics venture to suggest that the primeval bird , reptile , or fish must have been " specially created . " And this vast , this totally unprecedented ...
... groups as well as to the species of a genus , and not even Mr. Darwin's severest critics venture to suggest that the primeval bird , reptile , or fish must have been " specially created . " And this vast , this totally unprecedented ...
Página 12
... groups of facts , brings about change in the organic world , and keeps each species in harmony with the conditions of its existence , will appear to some persons so clear and simple as to need no further demonstration . But to the great ...
... groups of facts , brings about change in the organic world , and keeps each species in harmony with the conditions of its existence , will appear to some persons so clear and simple as to need no further demonstration . But to the great ...
Página 18
... groups of animals . Droughts , floods , severe winters , storms and hurricanes will injure these in various degrees , but no one species can be diminished in numbers without the effect being felt in various complex ways by all the rest ...
... groups of animals . Droughts , floods , severe winters , storms and hurricanes will injure these in various degrees , but no one species can be diminished in numbers without the effect being felt in various complex ways by all the rest ...
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