Darwinism: An Exposition of the Theory of Natural Selection, with Some of Its ApplicationsMacmillan and Company, 1889 - 494 páginas |
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Página xi
... intercrossing - Isolation as prevent- ing intercrossing - Gulick on the effects of isolation - Cases in which isolation is ineffective Pages 126-151 • CHAPTER VII ON THE INFERTILITY OF CROSSES BETWEEN DISTINCT SPECIES AND THE USUAL ...
... intercrossing - Isolation as prevent- ing intercrossing - Gulick on the effects of isolation - Cases in which isolation is ineffective Pages 126-151 • CHAPTER VII ON THE INFERTILITY OF CROSSES BETWEEN DISTINCT SPECIES AND THE USUAL ...
Página xiii
... Intercrossing not necessarily advantageous — Supposed evil results of close interbreeding - How the struggle for existence acts among flowers - Flowers the product of insect agency - Concluding remarks on colour in nature Pages 301-337 ...
... Intercrossing not necessarily advantageous — Supposed evil results of close interbreeding - How the struggle for existence acts among flowers - Flowers the product of insect agency - Concluding remarks on colour in nature Pages 301-337 ...
Página 119
... intercrossing with other individuals which are becoming adapted to somewhat different conditions in an adjacent area . But this question of the swamping effects of intercrossing will be considered in another chapter . Mr. Darwin was of ...
... intercrossing with other individuals which are becoming adapted to somewhat different conditions in an adjacent area . But this question of the swamping effects of intercrossing will be considered in another chapter . Mr. Darwin was of ...
Página 126
... intercrossing -- Isolation as prevent- ing intercrossing - Gulick on the effects of isolation - Cases in which isolation is ineffective . In the present chapter I propose to discuss the more obvious and often repeated objections to ...
... intercrossing -- Isolation as prevent- ing intercrossing - Gulick on the effects of isolation - Cases in which isolation is ineffective . In the present chapter I propose to discuss the more obvious and often repeated objections to ...
Página 142
... Intercrossing . This supposed insuperable difficulty was first advanced in an article in the North British Review in 1867 , and much attention has been attracted to it by the acknowledgment of Mr. Darwin that it proved to him that ...
... Intercrossing . This supposed insuperable difficulty was first advanced in an article in the North British Review in 1867 , and much attention has been attracted to it by the acknowledgment of Mr. Darwin that it proved to him that ...
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