The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeJohn Murray, Albemarle Street., 1891 - 432페이지 |
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82개의 결과 중 1 - 5개
v 페이지
... 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 5 CHAPTER II . VARIATION UNDER ...
... 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 5 CHAPTER II . VARIATION UNDER ...
xiii 페이지
... 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 . published his views in 1801 ; he much enlarged them. ADDITIONS AND ...
... 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 . published his views in 1801 ; he much enlarged them. ADDITIONS AND ...
xv 페이지
... principle of natural selection , and this is the first recognition which has been indicated ; but he applies it only to the races of man , and to certain characters alone . After remarking that negroes and mulattoes enjoy an immunity ...
... principle of natural selection , and this is the first recognition which has been indicated ; but he applies it only to the races of man , and to certain characters alone . After remarking that negroes and mulattoes enjoy an immunity ...
xvi 페이지
... principle of natural selection . The celebrated geologist and naturalist , Von Buch , in his excel- lent ' Description Physique des Isles Canaries ' ( 1836 , p . 147 ) , clearly expresses his belief that varieties slowly become changed ...
... principle of natural selection . The celebrated geologist and naturalist , Von Buch , in his excel- lent ' Description Physique des Isles Canaries ' ( 1836 , p . 147 ) , clearly expresses his belief that varieties slowly become changed ...
xviii 페이지
... principle of natural selection is concerned , it is quite immaterial whether or not Professor Owen preceded me , for both of us , as shown in this historical sketch , were long ago preceded by Dr. Wells and Mr. Matthews . M. Isidore ...
... principle of natural selection is concerned , it is quite immaterial whether or not Professor Owen preceded me , for both of us , as shown in this historical sketch , were long ago preceded by Dr. Wells and Mr. Matthews . M. Isidore ...
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accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species domestic animals doubt effects eggs embryo existing extinct extremely facts favourable female fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly nest occasionally occur oceanic islands offspring organisation organs parent peculiar perfect pigeon pistil pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed tend theory tion variability variations varieties vary whilst whole wings young