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
... domestic varieties from one or more species - Domestic Pigeons , their Differences and Origin- Principles of Selection , anciently followed , their Effects- Methodical and Unconscious Selection - Unknown Origin of our Domestic ...
... domestic varieties from one or more species - Domestic Pigeons , their Differences and Origin- Principles of Selection , anciently followed , their Effects- Methodical and Unconscious Selection - Unknown Origin of our Domestic ...
Página viii
... Domestic instincts , their origin - Natural instincts of the cuckoo , Molothrus , ostrich , and parasitic bees - Slave - making ants - Hive - bee , its cell - making instinct - Changes of instinct and structure not necessarily ...
... Domestic instincts , their origin - Natural instincts of the cuckoo , Molothrus , ostrich , and parasitic bees - Slave - making ants - Hive - bee , its cell - making instinct - Changes of instinct and structure not necessarily ...
Página xiv
... domestic produc- tions . With respect to the means of modification , he attributed something to the direct action of the physical conditions of life , something to the crossing of already existing forms , and much to use and disuse ...
... domestic produc- tions . With respect to the means of modification , he attributed something to the direct action of the physical conditions of life , something to the crossing of already existing forms , and much to use and disuse ...
Página xxiii
... domestic productions , from the changes which the embryos of many species undergo , from the difficulty of distinguishing species and varieties , and from the principle of general gradation , that species have been modified ; and he ...
... domestic productions , from the changes which the embryos of many species undergo , from the difficulty of distinguishing species and varieties , and from the principle of general gradation , that species have been modified ; and he ...
Página 7
... Domestic Varieties from one or more Species - Domestic Pigeons , their Differences and Origin- Principles of Selection , anciently followed , their Effects- Methodical and Unconscious Selection - Unknown Origin of our Domestic ...
... Domestic Varieties from one or more Species - Domestic Pigeons , their Differences and Origin- Principles of Selection , anciently followed , their Effects- Methodical and Unconscious Selection - Unknown Origin of our Domestic ...
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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