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 v
... common species , vary most - Species of the larger genera in each country vary more frequently than the species of the smaller genera - Many of the species of the larger genera resemble varieties in being very closely , but unequally ...
... common species , vary most - Species of the larger genera in each country vary more frequently than the species of the smaller genera - Many of the species of the larger genera resemble varieties in being very closely , but unequally ...
Página vi
... common parent - Ex- plains the grouping of all organic beings - Advance in organ- isation - Low forms preserved - Convergence of Character- Indefinite multiplication of species - Summary CHAPTER V. LAWS OF VARIATION . . 97 Effects of ...
... common parent - Ex- plains the grouping of all organic beings - Advance in organ- isation - Low forms preserved - Convergence of Character- Indefinite multiplication of species - Summary CHAPTER V. LAWS OF VARIATION . . 97 Effects of ...
Página 9
... common result of changed conditions than definite variability , and has probably played a more important part in the forma- tion of our domestic races . We see indefinite vari- ability in the endless slight peculiarities which ...
... common result of changed conditions than definite variability , and has probably played a more important part in the forma- tion of our domestic races . We see indefinite vari- ability in the endless slight peculiarities which ...
Página 12
... common roses producing moss- roses - we clearly see that the nature of the conditions is of subordinate importance in comparison with the nature of the organism in determining each particular form of variation ; -perhaps of not more ...
... common roses producing moss- roses - we clearly see that the nature of the conditions is of subordinate importance in comparison with the nature of the organism in determining each particular form of variation ; -perhaps of not more ...
Página 20
... common camel , prevented their domestication ? I cannot doubt that if other animals and plants , equal in number to our domesticated productions , and belonging to equally diverse classes and countries , were taken from a state of ...
... common camel , prevented their domestication ? I cannot doubt that if other animals and plants , equal in number to our domesticated productions , and belonging to equally diverse classes and countries , were taken from a state of ...
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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