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
... V. LAWS OF VARIATION . Effects of changed conditions - Use and disuse , combined with natural selection ; organs of flight and of vision - Acclimatisa- tion - Correlated variation - Compensation and economy of growth vi CONTENTS .
... V. LAWS OF VARIATION . Effects of changed conditions - Use and disuse , combined with natural selection ; organs of flight and of vision - Acclimatisa- tion - Correlated variation - Compensation and economy of growth vi CONTENTS .
Page vii
Or the Preservation of Favored Races in the Struggle for Life Charles Darwin. tion - Correlated variation - Compensation and economy of growth - False correlations - Multiple , rudimentary , and lowly organised structures variable ...
Or the Preservation of Favored Races in the Struggle for Life Charles Darwin. tion - Correlated variation - Compensation and economy of growth - False correlations - Multiple , rudimentary , and lowly organised structures variable ...
Page x
... tion of the period of reproduction . The account of the electric organ of fishes added to . Analogical resemblance between the eyes of Cepha- lopods and Vertebrates . Claparčde on the analogical resemblance of the hair - claspers of the ...
... tion of the period of reproduction . The account of the electric organ of fishes added to . Analogical resemblance between the eyes of Cepha- lopods and Vertebrates . Claparčde on the analogical resemblance of the hair - claspers of the ...
Page xvi
... tion ; and then , he adds , but what is done in this latter case " by art , seems to be done with equal efficacy , though more slowly , by nature , in the formation of varieties of mankind , fitted for the country which they inhabit ...
... tion ; and then , he adds , but what is done in this latter case " by art , seems to be done with equal efficacy , though more slowly , by nature , in the formation of varieties of mankind , fitted for the country which they inhabit ...
Page xxiii
... tion . But he does not show how selection acts under nature . He believes , like Dean Herbert , that species , when nascent , were more plastic than at present . He lays weight on what he calls the principle of finality , " puissance ...
... tion . But he does not show how selection acts under nature . He believes , like Dean Herbert , that species , when nascent , were more plastic than at present . He lays weight on what he calls the principle of finality , " puissance ...
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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