The Origin of Species by Means of Natural Selection, Or, The Preservation of Favored Races in the Struggle for Life, Volumes 1-2D. Appleton, 1917 - Evolution |
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Page xviii
... seems that he attributes much influence to the direct action of the conditions of life . He clearly saw , however , the full force of the principle of natural selection . wonder in defir The celebrated geologist and naturalist , Von ...
... seems that he attributes much influence to the direct action of the conditions of life . He clearly saw , however , the full force of the principle of natural selection . wonder in defir The celebrated geologist and naturalist , Von ...
Page 84
... seems to be little doubt that the stock of partridges , grouse , and hares on any large estate depends chiefly on the de- struction of vermin . If not one head of game were shot during the next twenty years in England , and , at the ...
... seems to be little doubt that the stock of partridges , grouse , and hares on any large estate depends chiefly on the de- struction of vermin . If not one head of game were shot during the next twenty years in England , and , at the ...
Page 284
... seem to have produced some direct and definite effect , but how much we cannot say . Thus , when varie- ties enter any ... seems to have played an important part , so that when one part has been modified other parts have been necessarily ...
... seem to have produced some direct and definite effect , but how much we cannot say . Thus , when varie- ties enter any ... seems to have played an important part , so that when one part has been modified other parts have been necessarily ...
Contents
VARIATION UNDER DOMESTICATION | 7 |
CHAPTER II | 51 |
STRUGGLE FOR EXISTENCE | 66 |
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Common terms and phrases
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