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 11
... object will be to see whether or not these laws indicate that species have been specially endowed with this quality , in order to prevent their crossing and blending together in utter confusion . The following conclusions are drawn up ...
... object will be to see whether or not these laws indicate that species have been specially endowed with this quality , in order to prevent their crossing and blending together in utter confusion . The following conclusions are drawn up ...
Página 204
... objects , can be classed in many ways , either artificially by single characters , or more naturally by a number of characters . We know , for instance , that minerals and the elemental substances can be thus arranged . In this case ...
... objects , can be classed in many ways , either artificially by single characters , or more naturally by a number of characters . We know , for instance , that minerals and the elemental substances can be thus arranged . In this case ...
Página 302
... object in view . We possess no pedigrees or armorial bearings ; and we have to discover and trace the many diverging lines of descent in our natural genealogies , by characters of any kind which have long been inherited . Rudimentary ...
... object in view . We possess no pedigrees or armorial bearings ; and we have to discover and trace the many diverging lines of descent in our natural genealogies , by characters of any kind which have long been inherited . Rudimentary ...
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