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 26
... rock - pigeon ( Columba livia ) , in- cluding under this term several geographical races or sub - species , which differ from each other in the most trifling respects . As several of the reasons which have led me to this belief are in ...
... rock - pigeon ( Columba livia ) , in- cluding under this term several geographical races or sub - species , which differ from each other in the most trifling respects . As several of the reasons which have led me to this belief are in ...
Página 27
... rock - pigeons are known ; and these have not any of the characters of the domestic breeds Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated , and yet be unknown to ...
... rock - pigeons are known ; and these have not any of the characters of the domestic breeds Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domesticated , and yet be unknown to ...
Página 29
... rock - pigeon ! We can under- stand these facts , on the well - known principle of reversion to ancestral characters , if all the domestio breeds are descended from the rock - pigeon . But if we deny this , we must make one of the two ...
... rock - pigeon ! We can under- stand these facts , on the well - known principle of reversion to ancestral characters , if all the domestio breeds are descended from the rock - pigeon . But if we deny this , we must make one of the two ...
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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Otras ediciones - Ver todas
The Origin of Species by Means of Natural Selection: Or, the Preservation of ... Charles Darwin Sin vista previa disponible - 2016 |
On the Origin of Species by Means of Natural Selection Charles Darwin Sin vista previa disponible - 2016 |
The Origin of Species by Means of Natural Selection: Or the Preservation of ... Charles Darwin Sin vista previa disponible - 2018 |
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