On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeEaston Press, 1976 - 470 páginas |
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Página 328
... continent or of the same sea , though the species themselves are distinct at different points and stations . It is a law of the widest generality , and every continent offers innumerable instances . Nevertheless the naturalist , in ...
... continent or of the same sea , though the species themselves are distinct at different points and stations . It is a law of the widest generality , and every continent offers innumerable instances . Nevertheless the naturalist , in ...
Página 334
... continent , the close relation of the tertiary inhabitants of several lands and even seas to their present inhabitants , the degree of affinity between the mammals inhabiting islands with those of the nearest continent , being in part ...
... continent , the close relation of the tertiary inhabitants of several lands and even seas to their present inhabitants , the degree of affinity between the mammals inhabiting islands with those of the nearest continent , being in part ...
Página 340
... continent to a neighbouring island , but not from one distant continent to another . The floras of distant continents would not by such means become mingled ; but would remain as distinct as they now are . The currents , from their ...
... continent to a neighbouring island , but not from one distant continent to another . The floras of distant continents would not by such means become mingled ; but would remain as distinct as they now are . The currents , from their ...
Contenido
VARIATION UNDER NATURE | 30 |
STRUGGLE FOR EXISTENCE | 45 |
NATURAL SELECTION | 59 |
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Términos y frases comunes
accumulated adapted admit affinities allied species America ancient appear beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common progenitor continuous crossed crustaceans degree developed difficulty distinct species divergence doubt effects eggs embryo existing exterminated extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period gradations greater number groups of species habits Hence hybrids hybrids produced 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 offspring organisation organs Origin of Species parent peculiar perfect pigeons pistil plants pollen present preserved principle probably produced quadrupeds ranked reciprocal crosses remarked resemblance rudimentary seeds slight South America stamens sterility structure struggle successive supposed swimbladder theory variability variations varieties vary whilst whole wings young