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 |
도서 본문에서
60개의 결과 중 1 - 5개
xv 페이지
... colour of this vigorous race I take for granted , from what has been already said , would be dark . But the same disposition to form varieties still existing , a darker and a darker race would in the course of time occur : and as the ...
... colour of this vigorous race I take for granted , from what has been already said , would be dark . But the same disposition to form varieties still existing , a darker and a darker race would in the course of time occur : and as the ...
6 페이지
... colour from the nature of the food , thickness of the skin and hair from climate , etc. Each of the endless variations which we see in the plumage of our fowls must have had some efficient cause ; and if the same cause were to act ...
... colour from the nature of the food , thickness of the skin and hair from climate , etc. Each of the endless variations which we see in the plumage of our fowls must have had some efficient cause ; and if the same cause were to act ...
8 페이지
... Colour and constitutional peculiarities go together , of which many remarkable cases could be given amongst animals and plants . From facts collected by Heusinger , it appears that white. 8 [ CHAP . I. VARIATION UNDER DOMESTICATION .
... Colour and constitutional peculiarities go together , of which many remarkable cases could be given amongst animals and plants . From facts collected by Heusinger , it appears that white. 8 [ CHAP . I. VARIATION UNDER DOMESTICATION .
9 페이지
... coloured individuals escape : Professor Wyman has recently communicated to me a good illustration of this fact ; on asking some farmers in Virginia how it was that all their pigs were black , they informed him that the pigs ate the ...
... coloured individuals escape : Professor Wyman has recently communicated to me a good illustration of this fact ; on asking some farmers in Virginia how it was that all their pigs were black , they informed him that the pigs ate the ...
18 페이지
... colour , with the white loins , double black wing - bar , and barred and white- edged tail - feathers , as any wild ... coloured and marked like the rock - pigeon , although no other existing species is thus coloured and marked , so that ...
... colour , with the white loins , double black wing - bar , and barred and white- edged tail - feathers , as any wild ... coloured and marked like the rock - pigeon , although no other existing species is thus coloured and marked , so that ...
기타 출판본 - 모두 보기
자주 나오는 단어 및 구문
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