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 85
... Arctic regions , or snow - capped summits , or absolute deserts , the struggle for life is almost exclusively with the elements . That climate acts in main part indirectly by favouring other species , we clearly see in the prodigious ...
... Arctic regions , or snow - capped summits , or absolute deserts , the struggle for life is almost exclusively with the elements . That climate acts in main part indirectly by favouring other species , we clearly see in the prodigious ...
Página 95
... Arctic regions or on the borders of an utter desert , will competition cease . The land may be extremely cold or dry , yet there will be competition between some few species , or between the individuals of the same species , for the ...
... Arctic regions or on the borders of an utter desert , will competition cease . The land may be extremely cold or dry , yet there will be competition between some few species , or between the individuals of the same species , for the ...
Página 175
... arctic wolf may perhaps be mingled in our domestic breeds . The rat and mouse cannot be con- sidered as domestic animals , but they have been trans- ported by man to many parts of the world , and now have a far wider range than any ...
... arctic wolf may perhaps be mingled in our domestic breeds . The rat and mouse cannot be con- sidered as domestic animals , but they have been trans- ported by man to many parts of the world , and now have a far wider range than any ...
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