The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for LifeD. Appleton, 1904 - 435 páginas |
Dentro del libro
Página vi
... 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 .
... 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 .
Página vii
... law of Unity of Type and of the Conditions of Existence embraced by the theory of Natu- ral Selection . • . 207 CHAPTER VII . MISCELLANEOUS OBJECTIONS TO THE THEORY OF NATURAL SELECTION . Longevity - Modifications not necessarily ...
... law of Unity of Type and of the Conditions of Existence embraced by the theory of Natu- ral Selection . • . 207 CHAPTER VII . MISCELLANEOUS OBJECTIONS TO THE THEORY OF NATURAL SELECTION . Longevity - Modifications not necessarily ...
Página xii
... laws . " WHEWELL : Bridgewater Treatise . " The only distinct meaning of the word ' natural ' is stated , fixed , or settled ; since what is natural as much requires and presupposes an intelligent agent to render it so , i . e . , to ...
... laws . " WHEWELL : Bridgewater Treatise . " The only distinct meaning of the word ' natural ' is stated , fixed , or settled ; since what is natural as much requires and presupposes an intelligent agent to render it so , i . e . , to ...
Página xiv
... law , and not of miraculous interposition . Lamarck seems to have been chiefly led to his conclusion on the gradual change of species , by the difficulty of distinguishing species and varieties , by the almost perfect gradation of forms ...
... law , and not of miraculous interposition . Lamarck seems to have been chiefly led to his conclusion on the gradual change of species , by the difficulty of distinguishing species and varieties , by the almost perfect gradation of forms ...
Página xx
... laws or secondary causes the orderly succession and progression of such organic phenomena may have been committed , we , as yet , are ignorant . " In his Address to the British Association , in 1858 , he speaks ( p . li . ) of " the ...
... laws or secondary causes the orderly succession and progression of such organic phenomena may have been committed , we , as yet , are ignorant . " In his Address to the British Association , in 1858 , he speaks ( p . li . ) of " the ...
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Términos y frases comunes
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