The Origin of Species by Means of Natural Selection,: Or the Preservation of Favoured Races in the Struggle for LifeAppleton, 1898 - 432 páginas |
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Página 81
... formerly have had a similarly confined range , and after having been largely developed in some one sea , have spread widely . Nor have we any right to suppose that the seas of the world have always been so freely open from south to ...
... formerly have had a similarly confined range , and after having been largely developed in some one sea , have spread widely . Nor have we any right to suppose that the seas of the world have always been so freely open from south to ...
Página 87
... formerly deposited ; for it might well happen that strata which had subsided some miles nearer to the centre of the earth , and which had been pressed on by an enormous weight of superincumbent water , might have undergone far more ...
... formerly deposited ; for it might well happen that strata which had subsided some miles nearer to the centre of the earth , and which had been pressed on by an enormous weight of superincumbent water , might have undergone far more ...
Página 88
... formerly existed , we do not find infinitely numerous fine transi- tional forms closely joining them all together ; -the sudden manner in which several groups of species first appear in our European formations ; the almost entire ...
... formerly existed , we do not find infinitely numerous fine transi- tional forms closely joining them all together ; -the sudden manner in which several groups of species first appear in our European formations ; the almost entire ...
Página 98
... formerly explained and illustrated by examples , between the forms which are most like each other in all respects . Hence the improved and modified descendants of a spe- cies will generally cause the extermination of the parent- species ...
... formerly explained and illustrated by examples , between the forms which are most like each other in all respects . Hence the improved and modified descendants of a spe- cies will generally cause the extermination of the parent- species ...
Página 109
... formerly made a somewhat nearer approach to each other than they now do . It is a common belief that the more ancient a form is , by so much the more it tends to connect by some of its characters groups now widely separated from each ...
... formerly made a somewhat nearer approach to each other than they now do . It is a common belief that the more ancient a form is , by so much the more it tends to connect by some of its characters groups now widely separated from each ...
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Términos y frases comunes
admit affinity allied species ancient animals appear Archipelago arctic areas become believe birds Cambrian changes characters cies classification climate closely allied common progenitor continent crustaceans degree deposited difficulty distant distinct species domestic doubt embryo eral 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 sediment seeds Silurian South America stage stamens sterility structure successive suppose terrestrial tertiary theory tion variations varieties whilst widely different wings