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
... Varieties - Difficulty of distinguishing between Varieties and Species - Origin of domestic varieties from one or more species - Domestic Pigeons , their Differences and Origin- Principles of Selection , anciently followed , their ...
... Varieties - Difficulty of distinguishing between Varieties and Species - Origin of domestic varieties from one or more species - Domestic Pigeons , their Differences and Origin- Principles of Selection , anciently followed , their ...
Página vi
... varieties of the same species : often severe between species of the same genus - The relation of organism to organism the most important of all relations . Page 75 CHAPTER IV . NATURAL SELECTION ; OR THE SURVIVAL OF THE FITTEST ...
... varieties of the same species : often severe between species of the same genus - The relation of organism to organism the most important of all relations . Page 75 CHAPTER IV . NATURAL SELECTION ; OR THE SURVIVAL OF THE FITTEST ...
Página vii
... varieties - Transitions in habits of life- Diversified habits in the same species - Species with habits widely different from those of their allies - Organs of extreme perfection - Modes of transition - Cases of difficulty - Natura non ...
... varieties - Transitions in habits of life- Diversified habits in the same species - Species with habits widely different from those of their allies - Organs of extreme perfection - Modes of transition - Cases of difficulty - Natura non ...
Página xiv
... varieties , by the almost perfect gradation of forms in certain groups , and by the analogy of domestic produc- tions . With respect to the means of modification , he attributed something to the direct action of the physical conditions ...
... varieties , by the almost perfect gradation of forms in certain groups , and by the analogy of domestic produc- tions . With respect to the means of modification , he attributed something to the direct action of the physical conditions ...
Página xvi
... varieties of mankind , fitted for the country which they inhabit . Of the accidental varieties of man , which would occur among the first few and scattered inhabi- tants of the middle regions of Africa , some one would . be better ...
... varieties of mankind , fitted for the country which they inhabit . Of the accidental varieties of man , which would occur among the first few and scattered inhabi- tants of the middle regions of Africa , some one would . be better ...
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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