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 28
... principle of life ; this principle , according to Mr. 28 [ CHAP . IX STERILITY OF HYBRIDS .
... principle of life ; this principle , according to Mr. 28 [ CHAP . IX STERILITY OF HYBRIDS .
Página 29
Or, The Preservation of Favored Races in the Struggle for Life Charles Darwin. principle of life ; this principle , according to Mr. Herbert Spencer , being that life depends on , or consists in , the incessant action and reaction of ...
Or, The Preservation of Favored Races in the Struggle for Life Charles Darwin. principle of life ; this principle , according to Mr. Herbert Spencer , being that life depends on , or consists in , the incessant action and reaction of ...
Página 263
... principle of the economy of growth , explained in a former chapter , by which the materials forming any part , if not useful to the pos- sessor , are saved as far as is possible , will perhaps come into play in rendering a useless part ...
... principle of the economy of growth , explained in a former chapter , by which the materials forming any part , if not useful to the pos- sessor , are saved as far as is possible , will perhaps come into play in rendering a useless part ...
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