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 255
... to doubt , that the rudiments represent wings . Rudimentary organs sometimes retain their potentiality : this occasionally occurs with the mammæ of male mammals , which have been known to CHAP . XIV . ] 255 RUDIMENTARY ORGANS .
... to doubt , that the rudiments represent wings . Rudimentary organs sometimes retain their potentiality : this occasionally occurs with the mammæ of male mammals , which have been known to CHAP . XIV . ] 255 RUDIMENTARY ORGANS .
Página 257
... organ or lung . Many similar instances could be given . Useful organs , however little they may be developed , unless we have reason to suppose that they were formerly more highly developed , ought not to be con- sidered as rudimentary ...
... organ or lung . Many similar instances could be given . Useful organs , however little they may be developed , unless we have reason to suppose that they were formerly more highly developed , ought not to be con- sidered as rudimentary ...
Página 263
... rudimentary and would at last be wholly suppressed ; for the variations ... organs , by whatever steps they may have been degraded into their present ... rudimentary parts as useful as , or even sometimes more useful than , parts of high ...
... rudimentary and would at last be wholly suppressed ; for the variations ... organs , by whatever steps they may have been degraded into their present ... rudimentary parts as useful as , or even sometimes more useful than , parts of high ...
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