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 72
... parent - species . Undoubtedly there is one most important point of dif- ference between varieties and species ; namely , that the amount of difference between varieties , when compared with each other or with their parent - species ...
... parent - species . Undoubtedly there is one most important point of dif- ference between varieties and species ; namely , that the amount of difference between varieties , when compared with each other or with their parent - species ...
Page 142
... parent ( A ) more nu- merous than most of the other inhabitants of the same country ; they will also partake of those more general advantages which made the genus to which the parent- species belonged , a large genus in its own country ...
... parent ( A ) more nu- merous than most of the other inhabitants of the same country ; they will also partake of those more general advantages which made the genus to which the parent- species belonged , a large genus in its own country ...
Page 51
... parent , will render this a very rare event ; for in all cases the new and improved forms of life tend to supplant the old and unimproved forms . By the theory of natural selection all living species have been connected with the parent ...
... parent , will render this a very rare event ; for in all cases the new and improved forms of life tend to supplant the old and unimproved forms . By the theory of natural selection all living species have been connected with the parent ...
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