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 168
... inherited is at present not decisive ; but the remarkable cases observed by Brown - Séquard in guinea - pigs , of the inherited effects of operations , should make us cautious in denying this tendency . Hence it will perhaps be safest ...
... inherited is at present not decisive ; but the remarkable cases observed by Brown - Séquard in guinea - pigs , of the inherited effects of operations , should make us cautious in denying this tendency . Hence it will perhaps be safest ...
Page 194
... inherited much in common , -to parts which have recently and largely varied being more likely still to go on varying than parts which have long been inherited and have not varied - to natural selection hav- ing more or less completely ...
... inherited much in common , -to parts which have recently and largely varied being more likely still to go on varying than parts which have long been inherited and have not varied - to natural selection hav- ing more or less completely ...
Page 277
... inherited for long periods . As long as the conditions of life remain the same , we have reason to believe that a modification , which has already been inherited for many generations , may continue to be inherited for an almost infinite ...
... inherited for long periods . As long as the conditions of life remain the same , we have reason to believe that a modification , which has already been inherited for many generations , may continue to be inherited for an almost infinite ...
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