The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life, 1-2권D. Appleton, 1917 |
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... 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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Charles Darwin. in the marine faunas on the opposite sides of almost every continent , the close relation of the ... continents . Nor does the almost universally volcanic composition of such islands favour the admis- sion that they are ...
Charles Darwin. in the marine faunas on the opposite sides of almost every continent , the close relation of the ... continents . Nor does the almost universally volcanic composition of such islands favour the admis- sion that they are ...
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... continent to a neighbouring island , but not from one distant continent to another . The floras of distant continents would not by such means become mingled ; but would remain as distinct as they now are . The currents , from their ...
... continent to a neighbouring island , but not from one distant continent to another . The floras of distant continents would not by such means become mingled ; but would remain as distinct as they now are . The currents , from their ...
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adapted affinity allied species ancient animals appear Archipelago beak become believe belonging birds breeds Cambrian cause characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt eggs embryo Europe existing extinct extremely facts favourable fertilised fertility fish flowers formation formerly forms fossil Fritz Müller Gärtner genera genus geological geological period Glacial period gradations groups of species habits Hence hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner Marsupials migration modified descendants natural selection naturalists nearly occur oceanic islands offspring organisation parent peculiar perfect pigeon pistil plants pollen present probably produced progenitor quadrupeds ranked reciprocal crosses remarked resemblance seeds Silurian slight South America stage stamens sterility structure successive suppose theory tion variability variations varieties vary whilst whole widely different wings