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 185
... developed , unless it be unusually developed in one species or in a few species in comparison with the same part in many closely allied species . Thus , the wing of a bat is a most abnormal structure in the class of mammals , but the ...
... developed , unless it be unusually developed in one species or in a few species in comparison with the same part in many closely allied species . Thus , the wing of a bat is a most abnormal structure in the class of mammals , but the ...
Página 304
... developed consists of a mass of pollen - grains , affixed to an elastic foot - stalk or caudicle , and this to a ... developed . In other orchids the threads cohere at one end of the pollen - masses ; and this forms the first or nascent ...
... developed consists of a mass of pollen - grains , affixed to an elastic foot - stalk or caudicle , and this to a ... developed . In other orchids the threads cohere at one end of the pollen - masses ; and this forms the first or nascent ...
Página 316
... developed in an extraordinary degree or manner are more variable than other parts of the same species . Many analogous facts , all pointing in the same direction , could be added . Although very many species have almost certainly been ...
... developed in an extraordinary degree or manner are more variable than other parts of the same species . Many analogous facts , all pointing in the same direction , could be added . Although very many species have almost certainly been ...
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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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