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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... origin ex- plained - Summary " .. Page 202 CHAPTER XV . RECAPITULATION AND CONCLUSION . Recapitulation of the objections to the theory of Natural Selection -Recapitulation of the general and special circumstances in its favour - Causes ...
... origin ex- plained - Summary " .. Page 202 CHAPTER XV . RECAPITULATION AND CONCLUSION . Recapitulation of the objections to the theory of Natural Selection -Recapitulation of the general and special circumstances in its favour - Causes ...
Página 5
... origin . I am strength- ened in this conviction by a remarkable statement repeatedly made by Gärtner , namely , that if even the less fertile hybrids be artificially fertilised with hybrid pollen of the same kind , their fertility ...
... origin . I am strength- ened in this conviction by a remarkable statement repeatedly made by Gärtner , namely , that if even the less fertile hybrids be artificially fertilised with hybrid pollen of the same kind , their fertility ...
Página 53
... our sea - cliffs are everywhere formed by the intersection of various formations . This being the case , we are compelled to admit that the escarpments owe their origin in chief part to the rocks of which CHAP . X. ] 53 THE LAPSE OF TIME .
... our sea - cliffs are everywhere formed by the intersection of various formations . This being the case , we are compelled to admit that the escarpments owe their origin in chief part to the rocks of which CHAP . X. ] 53 THE LAPSE OF TIME .
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