The Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeCollier Books, 1962 - 512 páginas |
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Página 7
... Origin . The most important of those additional books on evolution are The Variation of Animals and Plants under Domestication ( 1868 ) , The Descent of Man and Selection in Relation to Sex ( 1871 ) , and The Expression of the Emotions ...
... Origin . The most important of those additional books on evolution are The Variation of Animals and Plants under Domestication ( 1868 ) , The Descent of Man and Selection in Relation to Sex ( 1871 ) , and The Expression of the Emotions ...
Página 42
... origin of our pigeons , it must be assumed that at least seven or eight species were so thoroughly domesticated in ancient times by half- civilised 42 / The Origin of Species.
... origin of our pigeons , it must be assumed that at least seven or eight species were so thoroughly domesticated in ancient times by half- civilised 42 / The Origin of Species.
Página 146
... origin of some of our domestic animals from several wild stocks ; the blood , for instance , of a tropical and ... origin , they cannot owe their constitutional differences to habit . The case of the Jerusalem artichoke , which is never ...
... origin of some of our domestic animals from several wild stocks ; the blood , for instance , of a tropical and ... origin , they cannot owe their constitutional differences to habit . The case of the Jerusalem artichoke , which is never ...
Contenido
An Historical Sketch | 15 |
Introduction | 25 |
Variation Under Nature | 58 |
Derechos de autor | |
Otras 13 secciones no mostradas
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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