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! |
Dentro del libro
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Página 61
... considered by highly - competent judges to be varieties , resemble species so completely in character , that they have been thus ranked by other highly - competent judges . But to discuss whether they ought to be called species or ...
... considered by highly - competent judges to be varieties , resemble species so completely in character , that they have been thus ranked by other highly - competent judges . But to discuss whether they ought to be called species or ...
Página 73
... considered necessary to give to any two forms the rank of species cannot be defined . In genera having more than the average number of species in any country , the species of these genera have more than the average number of varieties ...
... considered necessary to give to any two forms the rank of species cannot be defined . In genera having more than the average number of species in any country , the species of these genera have more than the average number of varieties ...
Página 312
... considered , and the others will hereafter be considered . They seem to me to partake little of the character of demonstration , and to have little weight in comparison with those in favour of the power of natural selection , aided by ...
... considered , and the others will hereafter be considered . They seem to me to partake little of the character of demonstration , and to have little weight in comparison with those in favour of the power of natural selection , aided by ...
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 |
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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