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 11
... Hence , if man goes on selecting , and thus augmenting , any peculiarity , he will almost certainly unconsciously modify other parts of the structure , owing to the mysterious laws of the correlation of growth . The result of the ...
... Hence , if man goes on selecting , and thus augmenting , any peculiarity , he will almost certainly unconsciously modify other parts of the structure , owing to the mysterious laws of the correlation of growth . The result of the ...
Página 13
... Hence it has been argued that no deductions can be drawn from domestic races to species in a state of nature . I have in vain endeavoured to discover on what decisive facts the above statement has so often and so boldly been made ...
... Hence it has been argued that no deductions can be drawn from domestic races to species in a state of nature . I have in vain endeavoured to discover on what decisive facts the above statement has so often and so boldly been made ...
Página 22
... Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated , and yet be unknown to ornithologists ; and this , con- sidering their size , habits , and remarkable characters ...
... Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated , and yet be unknown to ornithologists ; and this , con- sidering their size , habits , and remarkable characters ...
Página 23
... Hence it must be assumed not only that half - civilised man succeeded in thoroughly domesticating several species , but that he intention- ally or by chance picked out extraordinarily abnormal species ; and further , that these very ...
... Hence it must be assumed not only that half - civilised man succeeded in thoroughly domesticating several species , but that he intention- ally or by chance picked out extraordinarily abnormal species ; and further , that these very ...
Página 36
... hence the Thoulouse and the common breed , which differ only in colour , that most fleeting of characters , have lately been exhibited as distinct at our poultry- shows . I think these views further explain what has some- times been ...
... hence the Thoulouse and the common breed , which differ only in colour , that most fleeting of characters , have lately been exhibited as distinct at our poultry- shows . I think these views further explain what has some- times 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