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 57
... intermediate links ; nor will the commonly - assumed hybrid nature of the intermediate forms always remove the difficulty . In very many cases , however , one form is ranked as a variety of another , not because the intermediate links ...
... intermediate links ; nor will the commonly - assumed hybrid nature of the intermediate forms always remove the difficulty . In very many cases , however , one form is ranked as a variety of another , not because the intermediate links ...
Página 148
... intermediate species , also ( and this is a very important consideration ) , which connected the original species ... intermediate in character between the two groups descended from these two species . But as these two groups have gone ...
... intermediate species , also ( and this is a very important consideration ) , which connected the original species ... intermediate in character between the two groups descended from these two species . But as these two groups have gone ...
Página 212
... intermediate zone . The inter- mediate variety , consequently , will exist in lesser numbers from inhabiting a narrow and lesser area ; and practically , as far as I can make out , this rule holds . good with varieties in a state of ...
... intermediate zone . The inter- mediate variety , consequently , will exist in lesser numbers from inhabiting a narrow and lesser area ; and practically , as far as I can make out , this rule holds . good with varieties in a state of ...
Contenido
CHAPTER I | 5 |
VARIATION UNDER NATURE | 51 |
Its bearing on natural selectionThe term used in a wide sense | 75 |
Derechos de autor | |
Otras 5 secciones no mostradas
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