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 |
From inside the book
Results 1-3 of 79
Page 48
... doubt , as Mr. Wallace has remarked with much truth , a limit will be at last reached . For in- stance , there must be a limit to the fleetness of any terrestrial animal , as this will be determined by the 48 [ CHAP . L CIRCUMSTANCES ...
... doubt , as Mr. Wallace has remarked with much truth , a limit will be at last reached . For in- stance , there must be a limit to the fleetness of any terrestrial animal , as this will be determined by the 48 [ CHAP . L CIRCUMSTANCES ...
Page 250
... doubt the definite action of changed conditions , and the various causes of modifications , lately specified , have all produced an effect , probably a great effect , in- dependently of any advantage thus gained . But a still more ...
... doubt the definite action of changed conditions , and the various causes of modifications , lately specified , have all produced an effect , probably a great effect , in- dependently of any advantage thus gained . But a still more ...
Page 328
... doubt that the love of man has become instinctive in the dog . All wolves , foxes , jackals , and species of the cat genus , when kept tame , are most eager to attack poultry , sheep , and pigs ; and this tendency has been found ...
... doubt that the love of man has become instinctive in the dog . All wolves , foxes , jackals , and species of the cat genus , when kept tame , are most eager to attack poultry , sheep , and pigs ; and this tendency has been found ...
Contents
VARIATION UNDER DOMESTICATION | 7 |
CHAPTER II | 51 |
STRUGGLE FOR EXISTENCE | 66 |
14 other sections not shown
Other editions - View all
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