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 129
... improved , others will have to be improved in a corresponding degree , or they will be exterminated . Each new form , also , as soon as it has been much improved , will be able to spread over the open and continuous area , and will thus ...
... improved , others will have to be improved in a corresponding degree , or they will be exterminated . Each new form , also , as soon as it has been much improved , will be able to spread over the open and continuous area , and will thus ...
Página 146
... improved states of the same species , as well as the original parent - species itself , will generally tend to become extinct . So it probably will be with many whole collateral lines of descent , which will be conquered by later and ...
... improved states of the same species , as well as the original parent - species itself , will generally tend to become extinct . So it probably will be with many whole collateral lines of descent , which will be conquered by later and ...
Página 213
... improving their breeds more quickly than the small holders on the intermediate narrow , hilly tract ; and consequently the improved mountain or plain breed will soon take the place of the less improved hill breed ; and thus the two ...
... improving their breeds more quickly than the small holders on the intermediate narrow , hilly tract ; and consequently the improved mountain or plain breed will soon take the place of the less improved hill breed ; and thus 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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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