The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeCollier Books, 1962 - 512 páginas |
Dentro del libro
Resultados 1-3 de 85
Página 34
... inherited , less strange and commoner deviations may be freely admitted to be inheritable . Perhaps the correct way of viewing the whole subject would be , to look at the inheritance of every character whatever as the rule , and non ...
... inherited , less strange and commoner deviations may be freely admitted to be inheritable . Perhaps the correct way of viewing the whole subject would be , to look at the inheritance of every character whatever as the rule , and non ...
Página 141
... inherited is at present not decisive ; but the remarkable cases observed by Brown - Séquard in guinea - pigs , of the inherited effects of oper- ations , should make us cautious in denying this tendency . Hence it will perhaps be safest ...
... inherited is at present not decisive ; but the remarkable cases observed by Brown - Séquard in guinea - pigs , of the inherited effects of oper- ations , should make us cautious in denying this tendency . Hence it will perhaps be safest ...
Página 446
... inherited at a corresponding not early period . But the case of the short - faced tumbler , which when twelve hours old possessed its proper characters , proves that this is not the universal rule ; for here the characteristic differ ...
... inherited at a corresponding not early period . But the case of the short - faced tumbler , which when twelve hours old possessed its proper characters , proves that this is not the universal rule ; for here the characteristic differ ...
Contenido
An Historical Sketch | 15 |
Introduction | 25 |
Variation Under Nature | 58 |
Derechos de autor | |
Otras 13 secciones no mostradas
Otras ediciones - Ver todas
Términos y frases comunes
accumulated adapted admit affinities allied species America analogous ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological Glacial period gradations greater number groups of species 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 offspring organisation organs Origin of Species parent peculiar perfect pigeons pistil pollen present principle probably produced progenitor 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