The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1898 |
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Página 14
... Hence if man goes on selecting , and thus augmenting , any peculiarity , he will almost certainly modify unintentionally other parts of the structure , owing to the mysterious laws of correlation . The results of the various , unknown ...
... Hence if man goes on selecting , and thus augmenting , any peculiarity , he will almost certainly modify unintentionally other parts of the structure , owing to the mysterious laws of correlation . The results of the various , unknown ...
Página 16
... 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 27
... 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 , considering 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 , considering their size , habits , and remarkable characters ...
Página 28
... 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 45
... hence the Toulouse and the common breed , which differ only in colour , that most fleeting of characters , have lately been exhibited as distinct at our poultry - shows . These views appear to explain what has sometimes been noticed ...
... hence the Toulouse and the common breed , which differ only in colour , that most fleeting of characters , have lately been exhibited as distinct at our poultry - shows . These views appear to explain what has sometimes been noticed ...
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Términos y frases comunes
adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree descendants developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young