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 63
... accumulated in the shallow parts , which are the most favourable to life . Still less can this have happened during the alternate periods of elevation ; or , to speak more accurately , the beds which were then accumulated will generally ...
... accumulated in the shallow parts , which are the most favourable to life . Still less can this have happened during the alternate periods of elevation ; or , to speak more accurately , the beds which were then accumulated will generally ...
Página 75
... accumulated , by the incessant coast - action , as we now see on the shores of South America . Even throughout the extensive and shallow seas within the archipelago , sedimentary beds could hardly be accumulated of great thickness ...
... accumulated , by the incessant coast - action , as we now see on the shores of South America . Even throughout the extensive and shallow seas within the archipelago , sedimentary beds could hardly be accumulated of great thickness ...
Página 92
... accumulation of enduring formations , rich in fossils , depends on great masses of sediment being deposited on subsiding areas , our formations have been almost necessarily accumulated at wide and irregularly intermittent intervals of ...
... accumulation of enduring formations , rich in fossils , depends on great masses of sediment being deposited on subsiding areas , our formations have been almost necessarily accumulated at wide and irregularly intermittent intervals of ...
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