The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life, 2±ÇD. Appleton, 1896 |
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... continent - Centres of creation - Means of dispersal , by changes of climate and of the level of the land , and by occasional means - Dispersal during the Glacial period -Alternate Glacial periods in the north and south .. 129 CHAPTER ...
... continent - Centres of creation - Means of dispersal , by changes of climate and of the level of the land , and by occasional means - Dispersal during the Glacial period -Alternate Glacial periods in the north and south .. 129 CHAPTER ...
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... continent — Centres of creation — Meanis of dispersal , by changes of climate and of the level of the land , and by occasional means- -Dispersal during the Glacial period --- alternate Glacial periods in the north and south 129 CHAPTER ...
... continent — Centres of creation — Meanis of dispersal , by changes of climate and of the level of the land , and by occasional means- -Dispersal during the Glacial period --- alternate Glacial periods in the north and south 129 CHAPTER ...
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... continent when first broken up into an archipelago ) , and consequently during subsidence , though there will be much extinction , few new varieties or species will be formed ; and it is during these very periods of subsidence , that ...
... continent when first broken up into an archipelago ) , and consequently during subsidence , though there will be much extinction , few new varieties or species will be formed ; and it is during these very periods of subsidence , that ...
86 ÆäÀÌÁö
... continents of Europe and North America . This same view has since been maintained by Agassiz and others . But we do not know what was the state of things in the intervals between the several successive formations ; whether Europe and ...
... continents of Europe and North America . This same view has since been maintained by Agassiz and others . But we do not know what was the state of things in the intervals between the several successive formations ; whether Europe and ...
87 ÆäÀÌÁö
... continents now stand . Nor should we be justified in assuming that if , for instance , the bed of the Pacific Ocean were now converted into a continent we should there find sedimentary formations in a recognisable condition older than ...
... continents now stand . Nor should we be justified in assuming that if , for instance , the bed of the Pacific Ocean were now converted into a continent we should there find sedimentary formations in a recognisable condition older than ...
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accumulated adapted admit affinity allied species ancient animals appear Archipelago arctic areas become 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 larv©¡ less living mamm©¡ mammals manner marine Marsupials migration modified descendants mongrels mountains natural selection naturalists nearly occur oceanic islands offspring organisation pal©¡ontologists paleozoic parent parent-form peculiar perfect pistil plants pollen present probably produced quadrupeds reciprocal crosses regions remains remarked reproductive resemblance rocks rudimentary organs seeds Silurian South America species belonging stage stamens sterility structure successive suppose terrestrial tertiary tion variations varieties whilst widely different wings