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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Página 3
... descended , like varieties , from other species . Nevertheless , such a conclusion , even if well founded , would be unsatisfactory , until it could be shown how the innumerable species inhabiting this world have been modified , so as ...
... descended , like varieties , from other species . Nevertheless , such a conclusion , even if well founded , would be unsatisfactory , until it could be shown how the innumerable species inhabiting this world have been modified , so as ...
Página 15
... descended from one or several parent species . This point , if it could be cleared up , would be interesting ; if , for instance , it could be shown that the greyhound , bloodhound , terrier , spaniel , and bull - dog , which VARIATION ...
... descended from one or several parent species . This point , if it could be cleared up , would be interesting ; if , for instance , it could be shown that the greyhound , bloodhound , terrier , spaniel , and bull - dog , which VARIATION ...
Página 16
... descended from distinct species . In the case of some other domesticated species , there is presumptive , or even strong evidence , that all the breeds have descended from a single wild stock . It has often been assumed that man has ...
... descended from distinct species . In the case of some other domesticated species , there is presumptive , or even strong evidence , that all the breeds have descended from a single wild stock . It has often been assumed that man has ...
Página 17
... descended from several wild species . Knowing , as we do , that savages are very fond of taming animals , it seems to me unlikely , in the case of the dog - genus , which is distributed in a wild state throughout the world , that since ...
... descended from several wild species . Knowing , as we do , that savages are very fond of taming animals , it seems to me unlikely , in the case of the dog - genus , which is distributed in a wild state throughout the world , that since ...
Página 18
... descended from the common wild duck and rabbit . The doctrine of the origin of our several domestic races from several aboriginal stocks , has been carried to an absurd extreme by some authors . They believe that every race which breeds ...
... descended from the common wild duck and rabbit . The doctrine of the origin of our several domestic races from several aboriginal stocks , has been carried to an absurd extreme by some authors . They believe that every race which breeds ...
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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