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 97
... become extinct ; as if mere bodily strength gave victory in the battle of life . Mere size , on the contrary , would ... become rare before they become extinct - to feel no surprise at the rarity of a species , and yet to marvel greatly ...
... become extinct ; as if mere bodily strength gave victory in the battle of life . Mere size , on the contrary , would ... become rare before they become extinct - to feel no surprise at the rarity of a species , and yet to marvel greatly ...
Página 234
... become so much obscured as to be finally lost , by the reduction and ultimately by the complete abortion of certain parts , by the fusion of other parts , and by the doubling or multiplication of others , -variations which we know to be ...
... become so much obscured as to be finally lost , by the reduction and ultimately by the complete abortion of certain parts , by the fusion of other parts , and by the doubling or multiplication of others , -variations which we know to be ...
Página 262
... become reduced in size in the adult descendants of this animal , but would retain nearly its original standard of development in the embryo . There remains , however , this difficulty . After an organ has ceased being used , and has become ...
... become reduced in size in the adult descendants of this animal , but would retain nearly its original standard of development in the embryo . There remains , however , this difficulty . After an organ has ceased being used , and has become ...
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