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 91
... inhabitants of an area to change abruptly , or simul- taneously , or to an equal degree . The process of modifi- cation must be slow , and will generally affect only a few species at the same time ; for the variability of each species ...
... inhabitants of an area to change abruptly , or simul- taneously , or to an equal degree . The process of modifi- cation must be slow , and will generally affect only a few species at the same time ; for the variability of each species ...
Página 152
... inhabitants of the north , these would take the places of the former inhabitants of the temperate regions . The latter , at the same time , would travel further and further south- ward , unless they were stopped by barriers , in which ...
... inhabitants of the north , these would take the places of the former inhabitants of the temperate regions . The latter , at the same time , would travel further and further south- ward , unless they were stopped by barriers , in which ...
Página 188
... Inhabitants of Islands to those of the nearest Mainland . The most striking and important fact for us is the affinity of the species which inhabit islands to those of the nearest mainland , without being actually the same . Numerous ...
... Inhabitants of Islands to those of the nearest Mainland . The most striking and important fact for us is the affinity of the species which inhabit islands to those of the nearest mainland , without being actually the same . Numerous ...
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