On the Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life1859 |
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Page vii
... crossing - Fertility of varieties when crossed and of their mongrel offspring not universal - Hybrids and mongrels compared independently of their fertility - Summary -- - 245-278 CHAPTER IX . ON THE IMPERFECTION OF THE Geological ...
... crossing - Fertility of varieties when crossed and of their mongrel offspring not universal - Hybrids and mongrels compared independently of their fertility - Summary -- - 245-278 CHAPTER IX . ON THE IMPERFECTION OF THE Geological ...
Page 14
... crossed offspring from a short - horned cow by a long - horned bull , the greater length of horn , though appearing late in life , is clearly due to the male element . Having alluded to the subject of reversion , I may here refer to a ...
... crossed offspring from a short - horned cow by a long - horned bull , the greater length of horn , though appearing late in life , is clearly due to the male element . Having alluded to the subject of reversion , I may here refer to a ...
Page 16
... crossed , —a subject hereafter to be discussed ) , domestic races of the same species differ from each other in the same manner as , only in most cases in a lesser degree than , do closely- allied species of the same genus in a state of ...
... crossed , —a subject hereafter to be discussed ) , domestic races of the same species differ from each other in the same manner as , only in most cases in a lesser degree than , do closely- allied species of the same genus in a state of ...
Page 19
... crossing of a few aboriginal species ; but by crossing we can get only forms in some degree intermediate between their parents ; and if we ༣ process , account for our several domestic races by this СНАР . І. 19 UNDER DOMESTICATION .
... crossing of a few aboriginal species ; but by crossing we can get only forms in some degree intermediate between their parents ; and if we ༣ process , account for our several domestic races by this СНАР . І. 19 UNDER DOMESTICATION .
Page 20
... crossing has been greatly ex- -aggerated . There can be no doubt that a race may be modified by occasional crosses , if aided ... crossed one with another for several generations , hardly two of them will be alike , and then the extreme ...
... crossing has been greatly ex- -aggerated . There can be no doubt that a race may be modified by occasional crosses , if aided ... crossed one with another for several generations , hardly two of them will be alike , and then the extreme ...
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Common terms and phrases
adapted affinities allied species America amount analogous ancient animals become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo Europe existing exterminated extinct extremely facts favourable Fcap fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites History hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring perfect pigeons plants pollen Post 8vo present principle probably produced progenitor racters ranked reciprocal crosses remarked resemble Second Edition seeds sexual selection Silurian slight South America sterility structure struggle successive suppose theory Third Edition tion variability variation varieties vary Vols whole widely Woodcuts