The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen1AMS Press, 1972 - 479 páginas This is a reproduction of the original artefact. Generally these books are created from careful scans of the original. This allows us to preserve the book accurately and present it in the way the author intended. Since the original versions are generally quite old, there may occasionally be certain imperfections within these reproductions. We're happy to make these classics available again for future generations to enjoy! |
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Página 127
... intervals of time , the young thus produced will gain so much in vigour and fertility over the off.pring from long - continued self - fertilisation , that they will have a better chance of surviving and propagating their kind ; and thus ...
... intervals of time , the young thus produced will gain so much in vigour and fertility over the off.pring from long - continued self - fertilisation , that they will have a better chance of surviving and propagating their kind ; and thus ...
Página 141
... intervals of time ; nor are they all supposed to endure for equal periods . Only those variations which are in some way profitable will be preserved or naturally selected . And here the importance of the principle of benefit derived ...
... intervals of time ; nor are they all supposed to endure for equal periods . Only those variations which are in some way profitable will be preserved or naturally selected . And here the importance of the principle of benefit derived ...
Página 209
... intervals of time . But it may be urged that when several closely - allied species inhabit the same territory , we surely ought to find at the present time many transitional forms . Let us take a simple case : in travelling from north ...
... intervals of time . But it may be urged that when several closely - allied species inhabit the same territory , we surely ought to find at the present time many transitional forms . Let us take a simple case : in travelling from north ...
Contenido
CHAPTER I | 5 |
VARIATION UNDER NATURE | 51 |
Its bearing on natural selectionThe term used in a wide sense | 75 |
Derechos de autor | |
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Términos y frases comunes
acquired 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 developed difficulty distinct species disuse 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 improved increase in number individual differences inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less likewise males manner Melipona Mivart natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species perfect period pigeons pollen pollen-grains present preserved principle probably produced progenitor quadrupeds rank Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion transitional tree variability variations varieties vary widely wings young