The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, 1권D. Appleton, 1898 |
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vi 페이지
... LAWS OF VARIATION . . 97 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 .
... LAWS OF VARIATION . . 97 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 .
vii 페이지
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 ...
x 페이지
... 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 . Claparède 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 . Claparède on the analogical resemblance of the hair - claspers of the ...
xvi 페이지
... 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 ...
xxiii 페이지
... 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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adapted advantage allied analogous animals and plants appear Asa Gray beak become bees believe birds breeds caudicle cause cells characters climate closely colour common crossed cuckoo degree descendants developed difficulty distinct species disuse divergence domestic animals domestic races doubt effects eggs existence extinct extremely facts favourable females flowers forms Fritz Müller genera genus giraffe gradations greater number groups habits Hence hermaphrodites hive-bee important increase inhabitants inherited insects instance instincts intercrossing intermediate kind lamellæ large number larger genera larvæ less males manner Melipona Mivart modified natural selection naturalists nearly nest occasionally offspring organisation organs origin Origin of Species parent perfect period pigeons pollen pollen-grains present preserved prey principle probably produced progenitor quadrupeds rank rarely Red Grouse relation remarked resemble rock-pigeon seeds sexes sexual selection slight stamens striped structure struggle supposed swimbladder tend tendency tion tree variability variations varieties vary widely wings young