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 36
... continued domestication be admitted , and it can hardly be rejected , it becomes in the highest degree improbable that similar conditions long - continued should likewise induce this tendency ; though in certain cases , with species ...
... continued domestication be admitted , and it can hardly be rejected , it becomes in the highest degree improbable that similar conditions long - continued should likewise induce this tendency ; though in certain cases , with species ...
Página 110
... continued tendency to divergence of character , which was formerly illustrated by this diagram , the more recent any form is , the more it will generally differ from its ancient progenitor . Hence we can understand the rule that the ...
... continued tendency to divergence of character , which was formerly illustrated by this diagram , the more recent any form is , the more it will generally differ from its ancient progenitor . Hence we can understand the rule that the ...
Página 111
... continued effects of extinction and divergence of character , has become divided into .everal sub - families and families , some of which are supposed to have perished at . different periods , and some to have endured to the present day ...
... continued effects of extinction and divergence of character , has become divided into .everal sub - families and families , some of which are supposed to have perished at . different periods , and some to have endured to the present day ...
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