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 73
... genus having a score of species , recent and extinct , and destroy four - fifths of them , no one doubts that the remainder will stand much more distinct from each other . If the extreme forms in the genus happen to have been thus ...
... genus having a score of species , recent and extinct , and destroy four - fifths of them , no one doubts that the remainder will stand much more distinct from each other . If the extreme forms in the genus happen to have been thus ...
Página 99
... genus , will be the most liable to extermination . Thus , as I believe , a number of new species descended from one species , that is a new genus , comes to supplant an old genus , belonging to the same family . But it must often have ...
... genus , will be the most liable to extermination . Thus , as I believe , a number of new species descended from one species , that is a new genus , comes to supplant an old genus , belonging to the same family . But it must often have ...
Página 209
... genus , but the genus gives the characters ; for this seems founded on the apprecia- tion of many trifling points of resemblance , too slight to be defined . Certain plants , belonging to the Malpighi- aceæ , bear perfect and degraded ...
... genus , but the genus gives the characters ; for this seems founded on the apprecia- tion of many trifling points of resemblance , too slight to be defined . Certain plants , belonging to the Malpighi- aceæ , bear perfect and degraded ...
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