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 17
... whilst kept under the same conditions , and whilst kept in a considerable body , so that free intercrossing might check , by blending together , any slight deviations in their structure , in such case , I grant that we could de- duce ...
... whilst kept under the same conditions , and whilst kept in a considerable body , so that free intercrossing might check , by blending together , any slight deviations in their structure , in such case , I grant that we could de- duce ...
Página 173
... whilst they were furnished with eyes , may formerly have ranged over both continents , and then have become extinct , excepting in their present secluded abodes . Far from feeling surprise that some of the cave - animals should be very ...
... whilst they were furnished with eyes , may formerly have ranged over both continents , and then have become extinct , excepting in their present secluded abodes . Far from feeling surprise that some of the cave - animals should be very ...
Página 291
... whilst very young and still symmetrical , with their eyes standing on opposite sides of the head , cannot long retain a vertical position , owing to the excessive depth of their bodies , the small size of their lateral fins , and to ...
... whilst very young and still symmetrical , with their eyes standing on opposite sides of the head , cannot long retain a vertical position , owing to the excessive depth of their bodies , the small size of their lateral fins , and to ...
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