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
... varieties by selective association - The influence of natural selection upon sterility and fertility - Physiological selection - Summary and concluding remarks • 152-186 CHAPTER VIII THE ORIGIN AND USES OF COLOUR IN ANIMALS The ...
... varieties by selective association - The influence of natural selection upon sterility and fertility - Physiological selection - Summary and concluding remarks • 152-186 CHAPTER VIII THE ORIGIN AND USES OF COLOUR IN ANIMALS The ...
Página 4
... varieties of some species may differ more than other species do from each other without shaking our confidence in the reality of species . " He further adduces certain facts in geology as being , in his opinion , " fatal to the theory ...
... varieties of some species may differ more than other species do from each other without shaking our confidence in the reality of species . " He further adduces certain facts in geology as being , in his opinion , " fatal to the theory ...
Página 6
... varieties , and that the species of each genus were all descended from a common ancestor ; but none of them gave a clue as to the law or the method by which the change had been effected . This was still “ the great mystery . " As to the ...
... varieties , and that the species of each genus were all descended from a common ancestor ; but none of them gave a clue as to the law or the method by which the change had been effected . This was still “ the great mystery . " As to the ...
Página 10
... varieties of any one species are the descendants of that species . Furthermore , I am convinced that Natural Selection has been the most im- portant , but not the exclusive , means of modification . It should be especially noted that ...
... varieties of any one species are the descendants of that species . Furthermore , I am convinced that Natural Selection has been the most im- portant , but not the exclusive , means of modification . It should be especially noted that ...
Página 34
... varieties of sheep will starve out other mountain varieties , so that the two cannot be kept together . In plants the same thing occurs . If several distinct varieties of wheat are sown together , and the mixed seed resown , some of the ...
... varieties of sheep will starve out other mountain varieties , so that the two cannot be kept together . In plants the same thing occurs . If several distinct varieties of wheat are sown together , and the mixed seed resown , some of the ...
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