On the Origin of Species by Means of Natural Selection |
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Page 5
... 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- On the generality of intercrosses between individuals of the same.
... 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- On the generality of intercrosses between individuals of the same.
Page 6
... comparable with habits , but different in their origin - Instincts graduated- Aphides and ants - Instincts variable - Domestic instincts , their origin - Natural instincts of the cuckoo , ostrich , and parasitic bees - Slave - making ...
... comparable with habits , but different in their origin - Instincts graduated- Aphides and ants - Instincts variable - Domestic instincts , their origin - Natural instincts of the cuckoo , ostrich , and parasitic bees - Slave - making ...
Page 7
... compared independently of their fertility - Sum- mary , . 217 CHAPTER IX . ON THE IMPERFECTION OF THE GEOLOGICAL RECORD . On the absence of intermediate varieties at the present day - On the nature of extinct intermediate varieties ; on ...
... compared independently of their fertility - Sum- mary , . 217 CHAPTER IX . ON THE IMPERFECTION OF THE GEOLOGICAL RECORD . On the absence of intermediate varieties at the present day - On the nature of extinct intermediate varieties ; on ...
Page 21
... compared one with another , and more especially when compared with all the species in nature to which they are nearest allied . With these exceptions ( and with that of the perfect fertility of varieties when crossed , -a subject ...
... compared one with another , and more especially when compared with all the species in nature to which they are nearest allied . With these exceptions ( and with that of the perfect fertility of varieties when crossed , -a subject ...
Page 31
... compared with all other Columbida , though so like in most other respects to the rock - pigeon ; the blue colour and ... comparing the several sub - breeds of these breeds , more especially those brought from distant countries , we can ...
... compared with all other Columbida , though so like in most other respects to the rock - pigeon ; the blue colour and ... comparing the several sub - breeds of these breeds , more especially those brought from distant countries , we can ...
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Common terms and phrases
accumulated adapted affinities allied species America amount ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living look male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring organic organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rudimentary seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation varieties vary whole widely