The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1898 |
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Página vi
... natural selection - The term used in a wide sense- Geometrical ratio of increase - Rapid increase of naturalised ... NATURAL SELECTION ; OR THE SURVIVAL OF THE FITTEST . Natural Selection - its power compared with man's selection - its ...
... natural selection - The term used in a wide sense- Geometrical ratio of increase - Rapid increase of naturalised ... NATURAL SELECTION ; OR THE SURVIVAL OF THE FITTEST . Natural Selection - its power compared with man's selection - its ...
Página xiv
... nature ; -such as the long neck of the giraffe for browsing on the by an internal spontaneity ; and whatsoever things were not thus constituted , perished , and still perish . " We here see the principle of natural selection shadowed ...
... nature ; -such as the long neck of the giraffe for browsing on the by an internal spontaneity ; and whatsoever things were not thus constituted , perished , and still perish . " We here see the principle of natural selection shadowed ...
Página xvi
... natural selection , and this is the first recognition which has been indi- cated ; but he applies it only to the races of man , and to certain characters alone . After remarking that ne- groes and mulattoes enjoy an immunity from ...
... natural selection , and this is the first recognition which has been indi- cated ; but he applies it only to the races of man , and to certain characters alone . After remarking that ne- groes and mulattoes enjoy an immunity from ...
Página 5
... Natural Selection will be treated at some length in the fourth chapter ; and we shall then see how Natural Selection almost in- evitably causes much Extinction of the less improved forms of life , and leads to what I have called Diver ...
... Natural Selection will be treated at some length in the fourth chapter ; and we shall then see how Natural Selection almost in- evitably causes much Extinction of the less improved forms of life , and leads to what I have called Diver ...
Página 44
... select , or only with much difficulty , any deviation of structure excepting such as is externally visible ; and indeed he rarely cares for what is internal . He can never act by selection , excepting on variations which are first given ...
... select , or only with much difficulty , any deviation of structure excepting such as is externally visible ; and indeed he rarely cares for what is internal . He can never act by selection , excepting on variations which are first given ...
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Términos y frases comunes
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 descendants developed difficulty distinct species disuse divergence 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 increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young