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 11-15 of 92
Page 54
... point of view many instances assuredly can be given . There is one point connected with individual dif- ferences , which is extremely perplexing : I refer to those genera which have been called " protean " or " polymorphic , " in which ...
... point of view many instances assuredly can be given . There is one point connected with individual dif- ferences , which is extremely perplexing : I refer to those genera which have been called " protean " or " polymorphic , " in which ...
Page 62
... points of structure which vary in the several species , and estimates numerically the relative frequency of the variations . He specifies above a dozen characters which may be found varying even on the same branch , sometimes according ...
... points of structure which vary in the several species , and estimates numerically the relative frequency of the variations . He specifies above a dozen characters which may be found varying even on the same branch , sometimes according ...
Page 72
... point of dif- ference between varieties and species ; namely , that the amount of difference between varieties , when compared with each other or with their parent - species , is much less than that between the species of the same genus ...
... point of dif- ference between varieties and species ; namely , that the amount of difference between varieties , when compared with each other or with their parent - species , is much less than that between the species of the same genus ...
Page 83
... points . Eggs or very young animals seem generally to suffer most , but this is not invariably the case . With plants there is a vast destruction of seeds , but , from some observations which I have made it appears that the seedlings ...
... points . Eggs or very young animals seem generally to suffer most , but this is not invariably the case . With plants there is a vast destruction of seeds , but , from some observations which I have made it appears that the seedlings ...
Page 88
... points of view , whence I could examine hundreds of acres of the unenclosed heath , and literally I could not see a ... point some hundred yards distant from one of the old clumps , I counted thirty - two little trees ; and one of them ...
... points of view , whence I could examine hundreds of acres of the unenclosed heath , and literally I could not see a ... point some hundred yards distant from one of the old clumps , I counted thirty - two little trees ; and one of them ...
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