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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83개의 결과 중 1 - 5개
vi 페이지
... parent - Explains the grouping of all organic beings - Advance in organisation - Low forms preserved - Convergence of Character- Indefinite multiplication of species - Summary 57 CHAPTER V. LAWS OF VARIATION . Effects of changed ...
... parent - Explains the grouping of all organic beings - Advance in organisation - Low forms preserved - Convergence of Character- Indefinite multiplication of species - Summary 57 CHAPTER V. LAWS OF VARIATION . Effects of changed ...
xxi 페이지
... parent - form . In June , 1859 , Professor Huxley gave a lecture before the Royal Institution on the ' Persistent Types of Animal Life . ' Referring to such cases , he remarks , " It is difficult to comprehend the meaning of such facts ...
... parent - form . In June , 1859 , Professor Huxley gave a lecture before the Royal Institution on the ' Persistent Types of Animal Life . ' Referring to such cases , he remarks , " It is difficult to comprehend the meaning of such facts ...
5 페이지
... parent species had been exposed under nature . There is , also , some probability in the view propounded by Andrew Knight , that this variability may be partly connected with excess of food . It seems clear that organic beings must be ...
... parent species had been exposed under nature . There is , also , some probability in the view propounded by Andrew Knight , that this variability may be partly connected with excess of food . It seems clear that organic beings must be ...
6 페이지
... parent or from some more remote ancestor . Even strongly - marked differences occa- sionally appear in the young of the same litter , and in seedlings from the same seed - capsule . At long intervals of time , out of millions of ...
... parent or from some more remote ancestor . Even strongly - marked differences occa- sionally appear in the young of the same litter , and in seedlings from the same seed - capsule . At long intervals of time , out of millions of ...
9 페이지
... parental type . Any variation which is not inherited is unimportant for us . But the number and diversity of inheritable ... parent - say , once amongst several million individuals - and it reappears in the child , the mere doctrine of ...
... parental type . Any variation which is not inherited is unimportant for us . But the number and diversity of inheritable ... parent - say , once amongst several million individuals - and it reappears in the child , the mere doctrine of ...
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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