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 xxiv
... known French botanist , M. Lecoq , writes in 1854 ( Etudes sur Géograph . Bot . , ' tom . i . p . 250 ) , " On voit que nos recherches sur la fixité ou la variation de l'espèce , nous conduisent directement aux idées émises ...
... known French botanist , M. Lecoq , writes in 1854 ( Etudes sur Géograph . Bot . , ' tom . i . p . 250 ) , " On voit que nos recherches sur la fixité ou la variation de l'espèce , nous conduisent directement aux idées émises ...
Página 63
... known , and its species were founded upon a few specimens , that is to say , were provisional . Just as we come to know them better , intermediate forms flow in , and doubts as to specific limits augment . " He also adds that it is the ...
... known , and its species were founded upon a few specimens , that is to say , were provisional . Just as we come to know them better , intermediate forms flow in , and doubts as to specific limits augment . " He also adds that it is the ...
Página 314
... known occasionally to arise under domestication . Of these latter variations several may be attributed to reversion ; and the characters which thus reappear were , it is probable , in many cases at first gained in a gradual manner . A ...
... known occasionally to arise under domestication . Of these latter variations several may be attributed to reversion ; and the characters which thus reappear were , it is probable , in many cases at first gained in a gradual manner . A ...
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