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 v
... Principles of Selection , anciently followed , their Effects- Methodical and Unconscious Selection - Unknown Origin of our Domestic Productions - Circumstances favourable to Man's power of Selection 7 CHAPTER II . VARIATION UNDER NATURE ...
... Principles of Selection , anciently followed , their Effects- Methodical and Unconscious Selection - Unknown Origin of our Domestic Productions - Circumstances favourable to Man's power of Selection 7 CHAPTER II . VARIATION UNDER NATURE ...
Página xiv
... principle of natural selection shadowed forth , but how little Aristotle fully comprehended the principle , is shown by his remarks on the formation of the teeth . branches of trees . But he likewise believed in a. xiv HISTORICAL SKETCH .
... principle of natural selection shadowed forth , but how little Aristotle fully comprehended the principle , is shown by his remarks on the formation of the teeth . branches of trees . But he likewise believed in a. xiv HISTORICAL SKETCH .
Página xvi
... principle of 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 ...
... principle of 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 ...
Página xviii
... principle of natural selection . The celebrated geologist and naturalist , Von Buch , in his excellent Description Physique des Isles Canaries ' ( 1836 , p . 147 ) , clearly expresses his belief that varieties slowly become changed into ...
... principle of natural selection . The celebrated geologist and naturalist , Von Buch , in his excellent Description Physique des Isles Canaries ' ( 1836 , p . 147 ) , clearly expresses his belief that varieties slowly become changed into ...
Página xxi
... others find Professor Owen's controversial writings as difficult to understand and to reconcile with each other , as I do . As far as the mere enunciation of the principle of natural selection is con- cerned. HISTORICAL SKETCH . xxi.
... others find Professor Owen's controversial writings as difficult to understand and to reconcile with each other , as I do . As far as the mere enunciation of the principle of natural selection is con- cerned. HISTORICAL SKETCH . xxi.
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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