On the Origin of Species by Means of Natural Selection: Or The Preservation of Favored Races in the Struggle for Life, Volumen2D. Appleton, 1888 - 458 páginas |
Dentro del libro
Resultados 1-5 de 87
Página vi
... parent - Explains the grouping of all organic beings Advance in organisation - Low forms preserved Convergence of character - Indefinite multiplication of species- Summary - .. - Page 62-105 CHAPTER V. LAWS OF VARIATION . Effects of ...
... parent - Explains the grouping of all organic beings Advance in organisation - Low forms preserved Convergence of character - Indefinite multiplication of species- Summary - .. - Page 62-105 CHAPTER V. LAWS OF VARIATION . Effects of ...
Página xxi
... 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 as ...
... 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 as ...
Página 5
... 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 ...
Página 6
... parent or from some more remote ancestor . Even strongly - marked differences occasionally appear in the young of the same litter , and in seedlings from the same seed - capsule . At long intervals of time , out of millions or ...
... parent or from some more remote ancestor . Even strongly - marked differences occasionally appear in the young of the same litter , and in seedlings from the same seed - capsule . At long intervals of time , out of millions or ...
Página 7
... parents . I may add , that as some organisms breed freely under the most unnatural conditions ( for instance , rabbits and ferrets kept in hutches ) , showing that their reproductive organs are not easily affected ; so will some animals ...
... parents . I may add , that as some organisms breed freely under the most unnatural conditions ( for instance , rabbits and ferrets kept in hutches ) , showing that their reproductive organs are not easily affected ; so will some animals ...
Otras ediciones - Ver todas
Términos y frases comunes
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