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 99
... species , that is a new genus , comes to supplant an old genus , belonging to the same family . But it must often have happened that a new species belonging to some one group has seized on the place occupied by a species belonging to a ...
... species , that is a new genus , comes to supplant an old genus , belonging to the same family . But it must often have happened that a new species belonging to some one group has seized on the place occupied by a species belonging to a ...
Página 225
... species , belonging to the larger genera , tend to inherit the advantages which made the groups to which they belong large and their parents dominant , they are almost sure to spread widely , and to seize on more and more places in the ...
... species , belonging to the larger genera , tend to inherit the advantages which made the groups to which they belong large and their parents dominant , they are almost sure to spread widely , and to seize on more and more places in the ...
Página 240
... animals belonging to several classes are now known to have the power of ordinary reproduction at an unusually early ... species belonging to the same class are closely similar , but become , when fully developed , widely dissimilar . A ...
... animals belonging to several classes are now known to have the power of ordinary reproduction at an unusually early ... species belonging to the same class are closely similar , but become , when fully developed , widely dissimilar . A ...
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