The Origin of Species by Means of Natural Selection: Or, The Preservation of Favored Races in the Struggle for Life, Volumen2AMS Press, 1972 |
Dentro del libro
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Página 122
... formerly different from what it now is . North America formerly partook strongly of the present character of the southern half of the con- tinent ; and the southern half was formerly more closely allied , than it is at present , to the ...
... formerly different from what it now is . North America formerly partook strongly of the present character of the southern half of the con- tinent ; and the southern half was formerly more closely allied , than it is at present , to the ...
Página 183
... formerly brought boulders to its western shores , and they may have formerly transported foxes , as now frequently happens in the arctic regions . Yet it cannot be said that small islands will not support at least small mammals , for ...
... formerly brought boulders to its western shores , and they may have formerly transported foxes , as now frequently happens in the arctic regions . Yet it cannot be said that small islands will not support at least small mammals , for ...
Página 257
... formerly , when still less developed , have been of even less use than at present , they cannot formerly have been produced through variation and natural selection , which acts solely by the preservation of useful modifications . They ...
... formerly , when still less developed , have been of even less use than at present , they cannot formerly have been produced through variation and natural selection , which acts solely by the preservation of useful modifications . They ...
Contenido
CONTENTS OF VOL | 1 |
CHAPTER X | 48 |
CHAPTER XII | 129 |
Derechos de autor | |
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Otras ediciones - Ver todas
The Origin of Species by Means of Natural Selection: Or, The Preservation of ... Charles Darwin Vista de fragmentos - 1962 |
The Origin of Species by Means of Natural Selection: Or, The Preservation of ... Charles Darwin Vista de fragmentos - 1963 |
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