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 114
... insects ; but their visits do not in any way benefit the plant . Now , let us suppose that the juice or nectar was excreted from the inside of the flowers of a certain number of plants of any species . Insects in seeking the nectar ...
... insects ; but their visits do not in any way benefit the plant . Now , let us suppose that the juice or nectar was excreted from the inside of the flowers of a certain number of plants of any species . Insects in seeking the nectar ...
Page 252
... insects ; the other closed , not coloured , destitute of nectar , and never visited by insects . Hence we may conclude that , if insects had not been developed on the face of the earth , our plants would not have been decked with ...
... insects ; the other closed , not coloured , destitute of nectar , and never visited by insects . Hence we may conclude that , if insects had not been developed on the face of the earth , our plants would not have been decked with ...
Page 314
... insects , the mem- bers of which lay their eggs in the bodies or eggs of other insects . IMAGO . The perfect ( generally winged ) reproductive state of an insect . INDIGENS . The aboriginal animal or vegetable inhabitants of a country ...
... insects , the mem- bers of which lay their eggs in the bodies or eggs of other insects . IMAGO . The perfect ( generally winged ) reproductive state of an insect . INDIGENS . The aboriginal animal or vegetable inhabitants of a country ...
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