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 77
... families , have really started into life at once , the fact would be fatal to the theory of evolution through natural selection . For the development by this means of a group of forms , all of which are descended from some one ...
... families , have really started into life at once , the fact would be fatal to the theory of evolution through natural selection . For the development by this means of a group of forms , all of which are descended from some one ...
Página 111
... families and families , some of which are supposed to have perished at . different periods , and some to have endured to the present day . By looking at the diagram we can see that if many of the extinct forms supposed to be imbedded in ...
... families and families , some of which are supposed to have perished at . different periods , and some to have endured to the present day . By looking at the diagram we can see that if many of the extinct forms supposed to be imbedded in ...
Página 204
... families , families , and orders , all under one great class . The grand fact of the natural subordination of organic beings in groups under groups , which , from its familiarity , does not always sufficiently strike us , is in my ...
... families , families , and orders , all under one great class . The grand fact of the natural subordination of organic beings in groups under groups , which , from its familiarity , does not always sufficiently strike us , is in my ...
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