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
... CHAPTER I. xiii 1 VARIATION UNDER DOMESTICATION . Causes of Variability - Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance - Character of . Do- mestic Varieties - Difficulty of distinguishing between ...
... CHAPTER I. xiii 1 VARIATION UNDER DOMESTICATION . Causes of Variability - Effects of Habit and the use or disuse of Parts - Correlated Variation - Inheritance - Character of . Do- mestic Varieties - Difficulty of distinguishing between ...
Página vi
... CHAPTER IV . NATURAL SELECTION ; OR THE SURVIVAL OF THE FITTEST . Natural Selection - its power compared with man's selection - its power on characters of trifling importance - its power at all ages and on both sexes - Sexual selection ...
... CHAPTER IV . NATURAL SELECTION ; OR THE SURVIVAL OF THE FITTEST . Natural Selection - its power compared with man's selection - its power on characters of trifling importance - its power at all ages and on both sexes - Sexual selection ...
Página vii
... CHAPTER VI . DIFFICULTIES OF THE THEORY . Difficulties of the theory of descent with modification - Absence or rarity of transitional varieties - Transitions in habits of life- Diversified habits in the same species - Species with ...
... CHAPTER VI . DIFFICULTIES OF THE THEORY . Difficulties of the theory of descent with modification - Absence or rarity of transitional varieties - Transitions in habits of life- Diversified habits in the same species - Species with ...
Página viii
Or, the Preservation of Favored Races in the Struggle for Life Charles Darwin. CHAPTER VIII . INSTINCT . Instincts comparable with habits , but different in their origin- Instincts graduated - Aphides and ants - Instincts variable ...
Or, the Preservation of Favored Races in the Struggle for Life Charles Darwin. CHAPTER VIII . INSTINCT . Instincts comparable with habits , but different in their origin- Instincts graduated - Aphides and ants - Instincts variable ...
Página x
... chapter consists of por- tions , in a much modified state , taken from chap . iv . of the former editions . The latter and larger part is new , and relates chiefly to the supposed incompetency of natural selection to account for the ...
... chapter consists of por- tions , in a much modified state , taken from chap . iv . of the former editions . The latter and larger part is new , and relates chiefly to the supposed incompetency of natural selection to account for the ...
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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