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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... seen in the latter chapters of this volume , seemed to throw some light on the origin of species - that mys- tery of mysteries , as it has been called by one of our greatest philosophers . On my return home , it occurred to me , in 1837 ...
... seen in the latter chapters of this volume , seemed to throw some light on the origin of species - that mys- tery of mysteries , as it has been called by one of our greatest philosophers . On my return home , it occurred to me , in 1837 ...
Página 13
... seen , and will hereafter be briefly discussed . I will here only allude to what may be called correlated variation . Important changes in the embryo or larva will probably entail changes in the mature animal . In monstrosities , the ...
... seen , and will hereafter be briefly discussed . I will here only allude to what may be called correlated variation . Important changes in the embryo or larva will probably entail changes in the mature animal . In monstrosities , the ...
Página 19
... seen that we have no right to expect often to find a generic amount of difference in our do- mesticated races . In attempting to estimate the amount of structural difference between allied domestic races , we are soon involved in doubt ...
... seen that we have no right to expect often to find a generic amount of difference in our do- mesticated races . In attempting to estimate the amount of structural difference between allied domestic races , we are soon involved in doubt ...
Página 40
... seen , as I am informed by him , any native dog in Spain like our pointer . By a similar process of selection , and by careful training , English racehorses have come to surpass in fleetness and size the parent Arabs , so that the ...
... seen , as I am informed by him , any native dog in Spain like our pointer . By a similar process of selection , and by careful training , English racehorses have come to surpass in fleetness and size the parent Arabs , so that the ...
Página 42
... seen great surprise expressed in horticultural works at the wonderful skill of gardeners , in having produced such splendid results from such poor materials ; but the art has been simple , and , as far as the final result is concerned ...
... seen great surprise expressed in horticultural works at the wonderful skill of gardeners , in having produced such splendid results from such poor materials ; but the art has been simple , and , as far as the final result is concerned ...
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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