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 200
... sometimes double and sometimes treble , is common ; the side of the face , moreover , is sometimes striped . The stripes are often plainest in the foal ; and some- times quite disappear in old horses . Colonel Poole has seen both gray ...
... sometimes double and sometimes treble , is common ; the side of the face , moreover , is sometimes striped . The stripes are often plainest in the foal ; and some- times quite disappear in old horses . Colonel Poole has seen both gray ...
Page 204
... sometimes they cause direct and definite effects ; and these may become strongly marked in the course of time , though we have not sufficient evidence on this head . Habit in produc- ing constitutional peculiarities and use in ...
... sometimes they cause direct and definite effects ; and these may become strongly marked in the course of time , though we have not sufficient evidence on this head . Habit in produc- ing constitutional peculiarities and use in ...
Page 216
... sometimes differ in the most important characters , is known to every natu- ralist : scarcely a single fact can be ... sometimes extremely different ; and as it has been used in classing varieties which have undergone a certain , and ...
... sometimes differ in the most important characters , is known to every natu- ralist : scarcely a single fact can be ... sometimes extremely different ; and as it has been used in classing varieties which have undergone a certain , and ...
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