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 57
... follow from unconscious selection , that is the preservation of the most useful or beautiful animals , with no ... follows from all the inhabit- ants of the same country being already so well adapted to each other , that new places in ...
... follow from unconscious selection , that is the preservation of the most useful or beautiful animals , with no ... follows from all the inhabit- ants of the same country being already so well adapted to each other , that new places in ...
Página 152
... follows . But we shall follow the changes more readily , by supposing a new glacial period slowly to come on , and then pass away , as formerly occurred . As the cold came on , and as each more southern zone became fitted for the ...
... follows . But we shall follow the changes more readily , by supposing a new glacial period slowly to come on , and then pass away , as formerly occurred . As the cold came on , and as each more southern zone became fitted for the ...
Página 230
... follows from the struggle for existence , and which almost inevitably leads to extinction and divergence of charac ... follow in our classifi- cation . We can understand why we value certain resemblances far more than others ; why we ...
... follows from the struggle for existence , and which almost inevitably leads to extinction and divergence of charac ... follow in our classifi- cation . We can understand why we value certain resemblances far more than others ; why we ...
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