The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
From inside the book
Results 1-5 of 99
Page vii
... Widely different organs in members of the same class , de- veloped from one and the same source - Reasons for disbeliev- ing in great and abrupt modifications . 262 CHAPTER VIII . INSTINCT . Instincts comparable with habits , CONTENTS .
... Widely different organs in members of the same class , de- veloped from one and the same source - Reasons for disbeliev- ing in great and abrupt modifications . 262 CHAPTER VIII . INSTINCT . Instincts comparable with habits , CONTENTS .
Page x
... reasons are given for disbelieving in great and sudden modifications . Gradations of character , often accompanied by changes of function , are likewise here incidentally considered . The statement with respect to young cuckoos ejecting ...
... reasons are given for disbelieving in great and sudden modifications . Gradations of character , often accompanied by changes of function , are likewise here incidentally considered . The statement with respect to young cuckoos ejecting ...
Page xxii
... reason for believing that specific characters " sont fixés , pour chaque espèce , tant qu'elle se perpétue au milieu des mêmes circonstances : ils se modifient , si les circonstances ambiantes viennent à changer . " " En- résumé , l ...
... reason for believing that specific characters " sont fixés , pour chaque espèce , tant qu'elle se perpétue au milieu des mêmes circonstances : ils se modifient , si les circonstances ambiantes viennent à changer . " " En- résumé , l ...
Page 16
... reason why a peculiarity should appear at any particular age , yet that it does tend to appear in the offspring at the same period at which it first appeared in the parent . I believe this rule to be of the highest importance in ...
... reason why a peculiarity should appear at any particular age , yet that it does tend to appear in the offspring at the same period at which it first appeared in the parent . I believe this rule to be of the highest importance in ...
Page 21
... reasons which I cannot here give , I am doubtfully inclined . to believe , in opposition to several authors , that all the races belong to the same species . Having kept nearly all the English breeds of the fowl alive , having bred and ...
... reasons which I cannot here give , I am doubtfully inclined . to believe , in opposition to several authors , that all the races belong to the same species . Having kept nearly all the English breeds of the fowl alive , having bred and ...
Other editions - View all
Common terms and phrases
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