The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen2AMS Press, 1972 |
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Página 72
... range ; and we have seen that with plants it is those which have the widest range , that oftenest present varieties ; so that , with shells and other marine animals , it is probable that those which had the widest range , far exceeding ...
... range ; and we have seen that with plants it is those which have the widest range , that oftenest present varieties ; so that , with shells and other marine animals , it is probable that those which had the widest range , far exceeding ...
Página 137
... range that their range is continuous . What a strange anomaly it would be , if a directly opposite rule were to prevail , when we go down one step lower in the series , namely , to the individuals of the same species , and these had not ...
... range that their range is continuous . What a strange anomaly it would be , if a directly opposite rule were to prevail , when we go down one step lower in the series , namely , to the individuals of the same species , and these had not ...
Página 159
... range , and southward to the Pyrenees . We may infer from the frozen mammals and nature of the mountain vegetation , that Siberia was similarly affected . In the Lebanon , according to Dr. Hooker , perpetual snow formerly covered the ...
... range , and southward to the Pyrenees . We may infer from the frozen mammals and nature of the mountain vegetation , that Siberia was similarly affected . In the Lebanon , according to Dr. Hooker , perpetual snow formerly covered the ...
Contenido
CONTENTS OF VOL | 1 |
CHAPTER X | 48 |
CHAPTER XII | 129 |
Derechos de autor | |
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Términos y frases comunes
accumulated adapted admit adult affinity allied species ancient animals appear Archipelago arctic areas become beds believe birds breeds Cambrian changes characters classification climate closely allied continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo Europe existing extinct fact faunas fertilised fertility flowers formations formerly forms fossil fresh-water Fritz Müller Gärtner genera genus geological period geological record Glacial period groups of species habits hybrids hybrids produced important individuals inhabitants inherited insects instance intermediate intervals land larvæ less living mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian slight South America species belonging stage stamens sterility structure successive suppose terrestrial tertiary tion variations varieties whilst widely different wings