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 89
... insects . Hence , if certain insectivorous birds were to decrease in Paraguay , the parasitic insects would probably increase ; and this and this would lessen the number of the navel - frequenting flies - then cattle and horses would ...
... insects . Hence , if certain insectivorous birds were to decrease in Paraguay , the parasitic insects would probably increase ; and this and this would lessen the number of the navel - frequenting flies - then cattle and horses would ...
Página 114
... insects ; but their visits do not in any way benefit the plant . Now , let us suppose that the juice or nectar was excreted from the inside of the flowers of a certain number of plants of any species . Insects in seeking the nectar ...
... insects ; but their visits do not in any way benefit the plant . Now , let us suppose that the juice or nectar was excreted from the inside of the flowers of a certain number of plants of any species . Insects in seeking the nectar ...
Página 283
... insects ; but to this latter point I shall hereafter recur . The resemblance is often wonderfully close , and is not confined to colour , but extends to form , and even to the manner in which the insects hold themselves . The ...
... insects ; but to this latter point I shall hereafter recur . The resemblance is often wonderfully close , and is not confined to colour , but extends to form , and even to the manner in which the insects hold themselves . The ...
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 |
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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