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 113
... according to their mutual affinities , and in the second place according to their periods of existence , -do not accord in arrangement . The species extreine in character are not the oldest or the most recent ; nor are those which are ...
... according to their mutual affinities , and in the second place according to their periods of existence , -do not accord in arrangement . The species extreine in character are not the oldest or the most recent ; nor are those which are ...
Página 173
... according to Valenciennes , there is hardly a single group of which all the members are confined to fresh water , so that a marine species belonging to a fresh - water group might travel far along the shores of the sea , and could , it ...
... according to Valenciennes , there is hardly a single group of which all the members are confined to fresh water , so that a marine species belonging to a fresh - water group might travel far along the shores of the sea , and could , it ...
Página 199
... according or not , as those which entered happened to come into more or less direct competition with each other and with the aborigines ; and according as the immigrants were capable of varying more or less rapidly , there would ensue ...
... according or not , as those which entered happened to come into more or less direct competition with each other and with the aborigines ; and according as the immigrants were capable of varying more or less rapidly , there would ensue ...
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