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 xviii
... side of change . The ' Vestiges of Creation ' appeared in 1844. In the tenth and much improved edition ( 1853 ) the anonymous author says ( p . 155 ) : - " The proposition determined on after much consideration is , that the several ...
... side of change . The ' Vestiges of Creation ' appeared in 1844. In the tenth and much improved edition ( 1853 ) the anonymous author says ( p . 155 ) : - " The proposition determined on after much consideration is , that the several ...
Página 3
... sides of each question ; and this is here impossible . I much regret that want of space prevents my having the satisfaction of acknowledging the generous assistance which I have received from very many naturalists , some of them ...
... sides of each question ; and this is here impossible . I much regret that want of space prevents my having the satisfaction of acknowledging the generous assistance which I have received from very many naturalists , some of them ...
Página 68
... side , and all those in the smaller genera on the other side , the former will be found to include a somewhat larger number of the very common and much diffused or dominant species . This might have been anticipated ; for the mere fact ...
... side , and all those in the smaller genera on the other side , the former will be found to include a somewhat larger number of the very common and much diffused or dominant species . This might have been anticipated ; for the mere fact ...
Página 69
... side of the larger genera . I will here allude to only two čauses of obscurity . Fresh- water and salt - loving plants generally have very wide ranges and are much diffused , but this seems to be connected with the nature of the ...
... side of the larger genera . I will here allude to only two čauses of obscurity . Fresh- water and salt - loving plants generally have very wide ranges and are much diffused , but this seems to be connected with the nature of the ...
Página 70
... side , and those of the smaller genera on the other side , and it has in- variably proved to be the case that a larger propor- tion of the species on the side of the larger genera pre- sented varieties , than on the side of the smaller ...
... side , and those of the smaller genera on the other side , and it has in- variably proved to be the case that a larger propor- tion of the species on the side of the larger genera pre- sented varieties , than on the side of the smaller ...
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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