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 44
... various degrees of sterility to prevent their crossing and blending in nature , than to think that trees have been specially endowed with various and 44 [ CHAP . IX SUMMARY.
... various degrees of sterility to prevent their crossing and blending in nature , than to think that trees have been specially endowed with various and 44 [ CHAP . IX SUMMARY.
Página 160
... various parts of the Cordillera , from lat . 13 ° to 30 ° S. , at about the height of 12,000 feet , deeply - furrowed rocks , resembling those with which he was familiar in Norway , and likewise great masses of detritus , including ...
... various parts of the Cordillera , from lat . 13 ° to 30 ° S. , at about the height of 12,000 feet , deeply - furrowed rocks , resembling those with which he was familiar in Norway , and likewise great masses of detritus , including ...
Página 228
... various ways and degrees , to all the species ; and they will consequently be related to each other by circuitous lines of affinity of various lengths ( as may be seen in the diagram so often referred to ) , mounting up through many ...
... various ways and degrees , to all the species ; and they will consequently be related to each other by circuitous lines of affinity of various lengths ( as may be seen in the diagram so often referred to ) , mounting up through many ...
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