On the Origin of Species by Means of Natural Selection: Or The Preservation of Favoured Races in the Struggle for LifeHumphrey Milford, Oxford University Press, 1923 - 454 páginas |
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... general currency and to secure its acceptance by means of his tuminous conception of Natural Selection . Organic Evolu- tion triumphed through Darwin . GRANT ALLEN . 273 823556 1 I CONTENTS CHAP . INTRODUCTION · 1. VARIATION UNDER.
... general currency and to secure its acceptance by means of his tuminous conception of Natural Selection . Organic Evolu- tion triumphed through Darwin . GRANT ALLEN . 273 823556 1 I CONTENTS CHAP . INTRODUCTION · 1. VARIATION UNDER.
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... tion . We shall thus see that a large amount of hereditary modification is at least possible ; and , what is equally or more important , we shall see how great is the power of man in accumulating by his Selection successive slight ...
... tion . We shall thus see that a large amount of hereditary modification is at least possible ; and , what is equally or more important , we shall see how great is the power of man in accumulating by his Selection successive slight ...
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... tion , and vary very slightly - perhaps hardly more than in a state of nature . A long list could easily be given of ' sporting plants ' ; by this term gardeners mean a single bud or offset , which suddenly assumes a new and sometimes ...
... tion , and vary very slightly - perhaps hardly more than in a state of nature . A long list could easily be given of ' sporting plants ' ; by this term gardeners mean a single bud or offset , which suddenly assumes a new and sometimes ...
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... tion ; I believe that some small part of the difference is due to their being descended from distinct species . In the case of some other domesticated species , there is presumptive , or even strong evidence , that all the breeds have ...
... tion ; I believe that some small part of the difference is due to their being descended from distinct species . In the case of some other domesticated species , there is presumptive , or even strong evidence , that all the breeds have ...
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... tion . Who can believe that animals closely resembling the Italian greyhound , the bloodhound , the bull - dog , or Blenheim spaniel , etc. - so unlike all wild Canida —ever existed freely in a state of nature ? It has often been ...
... tion . Who can believe that animals closely resembling the Italian greyhound , the bloodhound , the bull - dog , or Blenheim spaniel , etc. - so unlike all wild Canida —ever existed freely in a state of nature ? It has often been ...
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Términos y frases comunes
accumulated adapted affinities allied species America amount analogous ancient appear Archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence doubt embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation vary whole widely