The Origin of Species by Means of Natural Selection: Or, the Preservation of Favored Races in the Struggle for Life, Volumen1D. Appleton, 1898 |
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Página vi
... 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 .
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 xv
... law of progressive development ; and as all the forms of life thus tend to progress , in order to account for the ex- istence at the present day of simple productions , he maintains that such forms are now spontaneously gen- erated ...
... law of progressive development ; and as all the forms of life thus tend to progress , in order to account for the ex- istence at the present day of simple productions , he maintains that such forms are now spontaneously gen- erated ...
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Términos y frases comunes
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