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 v
... favourable to Man's power of Selection 7 CHAPTER II . VARIATION UNDER NATURE . Variability - Individual differences - Doubtful species - Wide rang- ing , much diffused , and common species , vary most - Species of the larger genera in ...
... favourable to Man's power of Selection 7 CHAPTER II . VARIATION UNDER NATURE . Variability - Individual differences - Doubtful species - Wide rang- ing , much diffused , and common species , vary most - Species of the larger genera in ...
Page vi
... favourable and unfavourable to the results of Natural Selection , namely , intercrossing , isolation , number of individuals — Slow action - Extinction caused by Natural Se- lection - Divergence of Character , related to the diversity ...
... favourable and unfavourable to the results of Natural Selection , namely , intercrossing , isolation , number of individuals — Slow action - Extinction caused by Natural Se- lection - Divergence of Character , related to the diversity ...
Page 7
... favourable to Man's power of Selection . Causes of Variability . WHEN we compare the individuals of the same vari- ety or sub - variety of our older cultivated plants and ani- mals , one of the first points which strikes us is , that ...
... favourable to Man's power of Selection . Causes of Variability . WHEN we compare the individuals of the same vari- ety or sub - variety of our older cultivated plants and ani- mals , one of the first points which strikes us is , that ...
Page 32
... favourable circumstance for the production of distinct breeds , that male and female pigeons can be easily mated for life ; and thus different breeds can be kept together in the same aviary . I have discussed the probable origin of ...
... favourable circumstance for the production of distinct breeds , that male and female pigeons can be easily mated for life ; and thus different breeds can be kept together in the same aviary . I have discussed the probable origin of ...
Page 46
... favourable to Man's Power of Selection . I will now say a few words on the circumstances , favourable , or the reverse , to man's power of selection . A high degree of variability is obviously favourable , as freely giving the materials ...
... favourable to Man's Power of Selection . I will now say a few words on the circumstances , favourable , or the reverse , to man's power of selection . A high degree of variability is obviously favourable , as freely giving the materials ...
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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 lamellę larvę 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