On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, 2권D. Appleton, 1888 - 458페이지 |
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xii 페이지
... species , as always maintained in this work . The belief in the separate creation of species generally held by naturalists , until a recent period . AN HISTORICAL SKETCH OF THE PROGRESS OF OPINION ON THE xii Additions and Corrections .
... species , as always maintained in this work . The belief in the separate creation of species generally held by naturalists , until a recent period . AN HISTORICAL SKETCH OF THE PROGRESS OF OPINION ON THE xii Additions and Corrections .
xiii 페이지
... naturalists , on the other hand , have believed that species undergo modification , and that the existing forms of ... naturalist first pub- lished his views in 1801 ; he much enlarged them in 1809 in his ' Philosophie Zoologique , ' and ...
... naturalists , on the other hand , have believed that species undergo modification , and that the existing forms of ... naturalist first pub- lished his views in 1801 ; he much enlarged them in 1809 in his ' Philosophie Zoologique , ' and ...
xiv 페이지
... naturalists will be how , for instance , cattle got their horns , and not for what they are used . It is rather a singular instance of the manner in which similar views arise at about the same time , that Goethe in Germany , Dr. Darwin ...
... naturalists will be how , for instance , cattle got their horns , and not for what they are used . It is rather a singular instance of the manner in which similar views arise at about the same time , that Goethe in Germany , Dr. Darwin ...
xvi 페이지
... naturalist , Von Buch , in his ex- cellent Description Physique des Isles Canaries ' ( 1836 , p . 147 ) , clearly expresses his belief that varieties slowly become changed into permanent species , which are no longer capable of inter ...
... naturalist , Von Buch , in his ex- cellent Description Physique des Isles Canaries ' ( 1836 , p . 147 ) , clearly expresses his belief that varieties slowly become changed into permanent species , which are no longer capable of inter ...
1 페이지
... naturalist , I was much struck with certain facts in the distribution of the organic beings inhabit- ing South America , and in the geological relations of the present to the past inhabitants of that continent . These facts , as will be ...
... naturalist , I was much struck with certain facts in the distribution of the organic beings inhabit- ing South America , and in the geological relations of the present to the past inhabitants of that continent . These facts , as will be ...
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adapted admit affinities allied species America analogous ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour continued crossed crustaceans degree developed difficulty distinct species doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation formerly forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number habits Hence hybrids important 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 reproductive resemblance rudimentary seeds sexual selection slight South America stamens sterility structure struggle successive supposed tend theory tion variability variations varieties vary whilst whole wings young