The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
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Page vi
... selection — The term used in a ... SELECTION ; OR THE SURVIVAL OF THE FITTEST . Natural Selection - its power compared with man's selection - its power on characters of trifling importance - its power at all ages and on both sexes - Sexual ...
... selection — The term used in a ... SELECTION ; OR THE SURVIVAL OF THE FITTEST . Natural Selection - its power compared with man's selection - its power on characters of trifling importance - its power at all ages and on both sexes - Sexual ...
Page vii
... sexual characters variable - Species of the same genus vary in an analogous manner - Reversions to long - lost characters - Summary Page 164 · CHAPTER VI . DIFFICULTIES OF THE THEORY . Difficulties of the theory of descent with ...
... sexual characters variable - Species of the same genus vary in an analogous manner - Reversions to long - lost characters - Summary Page 164 · CHAPTER VI . DIFFICULTIES OF THE THEORY . Difficulties of the theory of descent with ...
Page 11
... sexual reproduction ; but this is certainly an error ; for I have given in another work a long list of " sporting plants , " as they are called by gardeners ; that is , of plants which have suddenly produced a single bud with a new and ...
... sexual reproduction ; but this is certainly an error ; for I have given in another work a long list of " sporting plants , " as they are called by gardeners ; that is , of plants which have suddenly produced a single bud with a new and ...
Page 97
... SELECTION ; OR THE SURVIVAL OF THE FITTEST . Natural Selection - its power compared with man's selection -- its power on characters of trifling importance - its power at all ages and on both sexes - Sexual Selection — On the generality ...
... SELECTION ; OR THE SURVIVAL OF THE FITTEST . Natural Selection - its power compared with man's selection -- its power on characters of trifling importance - its power at all ages and on both sexes - Sexual Selection — On the generality ...
Page 107
... hereditarily attached to that sex , so no doubt it will be under nature . Thus it is rendered possible for the two sexes to be modified through natural selection in relation to different habits of life CHAP . IV . ] 107 SEXUAL SELECTION .
... hereditarily attached to that sex , so no doubt it will be under nature . Thus it is rendered possible for the two sexes to be modified through natural selection in relation to different habits of life CHAP . IV . ] 107 SEXUAL SELECTION .
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adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ larvæ less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young