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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... fact in the great difference between the inhabitants of Australia , Africa , and South America under the same latitude ; for these countries are almost as much isolated from each other as is possible . On each continent , also , we see ...
... fact in the great difference between the inhabitants of Australia , Africa , and South America under the same latitude ; for these countries are almost as much isolated from each other as is possible . On each continent , also , we see ...
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... fact that all organisms , recent and ex- tinct , are included under a few great orders , and under still fewer classes . As showing how few the higher groups are in number , and how widely they are spread throughout the world , the fact ...
... fact that all organisms , recent and ex- tinct , are included under a few great orders , and under still fewer classes . As showing how few the higher groups are in number , and how widely they are spread throughout the world , the fact ...
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... fact , if species had been independently created and varieties had been produced through secondary laws . If we admit that the geological record is imperfect to an extreme degree , then the facts , which the record does give , strongly ...
... fact , if species had been independently created and varieties had been produced through secondary laws . If we admit that the geological record is imperfect to an extreme degree , then the facts , which the record does give , strongly ...
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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