On the Origin of Species by Means of Natural Selection, Or, The Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 |
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Página vii
... RUDIMENTARY ORGANS . CLASSIFICATION , groups subordinate to groups - Natural system- Rules and difficulties in classification , explained on the theory of descent with modification - Classification of varieties - De- scent always used ...
... RUDIMENTARY ORGANS . CLASSIFICATION , groups subordinate to groups - Natural system- Rules and difficulties in classification , explained on the theory of descent with modification - Classification of varieties - De- scent always used ...
Página 207
... rudimentary or atrophied organs are of high physiological or vital importance ; yet , undoubtedly , organs in this condition are often of much value in classification . No one will dispute that the rudimentary teeth in the upper jaws of ...
... rudimentary or atrophied organs are of high physiological or vital importance ; yet , undoubtedly , organs in this condition are often of much value in classification . No one will dispute that the rudimentary teeth in the upper jaws of ...
Página 231
... rudimentary organs , as well as from the successive periods at which the various forms of life are believed . to have first appeared in our geological formations . He has thus boldly made a great beginning , and shows us how ...
... rudimentary organs , as well as from the successive periods at which the various forms of life are believed . to have first appeared in our geological formations . He has thus boldly made a great beginning , and shows us how ...
Página 255
... to doubt , that the rudiments repre- sent wings . Rudimentary organs sometimes retain their potentiality : this occasionally occurs with the mam- mæ of male mammals , which have been known to CHAP . XIV . ] 255 RUDIMENTARY ORGANS .
... to doubt , that the rudiments repre- sent wings . Rudimentary organs sometimes retain their potentiality : this occasionally occurs with the mam- mæ of male mammals , which have been known to CHAP . XIV . ] 255 RUDIMENTARY ORGANS .
Página 257
... rudimentary for its proper purpose , and be used for a distinct one : in certain fishes the swim - bladder seems to be rudimentary for its proper function of giving buoyancy , but has become converted into a nascent breathing organ or ...
... rudimentary for its proper purpose , and be used for a distinct one : in certain fishes the swim - bladder seems to be rudimentary for its proper function of giving buoyancy , but has become converted into a nascent breathing organ or ...
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Términos y frases comunes
admit affinity allied species ancient animals appear Archipelago arctic areas become believe birds Cambrian changes characters cies classification climate closely allied common progenitor continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo eral 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 sediment seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst widely different wings