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 8
... reasons make me believe in this ; but the chief one is the remarkable effect which confine- ment or cultivation has on the functions of the repro- ductive system ; this system appearing to be far more susceptible than any other part of ...
... reasons make me believe in this ; but the chief one is the remarkable effect which confine- ment or cultivation has on the functions of the repro- ductive system ; this system appearing to be far more susceptible than any other part of ...
Page 14
... reason why a pecu- liarity should appear at any particular age , yet that it does tend to appear in the offspring at the same period at which it first appeared in the parent . I believe this rule to be of the highest importance in ...
... reason why a pecu- liarity should appear at any particular age , yet that it does tend to appear in the offspring at the same period at which it first appeared in the parent . I believe this rule to be of the highest importance in ...
Page 18
... reasons which I cannot give here , I am doubtfully inclined to believe , in opposition to several authors , that all the races have descended from one wild stock . Mr. Blyth , whose opinion , from his large and varied stores of ...
... reasons which I cannot give here , I am doubtfully inclined to believe , in opposition to several authors , that all the races have descended from one wild stock . Mr. Blyth , whose opinion , from his large and varied stores of ...
Page 23
... reasons which have led me to this belief are in some degree applicable in other cases , I will here briefly give them . If the several breeds are not varieties , and have not proceeded from the rock - pigeon , they must have descended ...
... reasons which have led me to this belief are in some degree applicable in other cases , I will here briefly give them . If the several breeds are not varieties , and have not proceeded from the rock - pigeon , they must have descended ...
Page 26
... to me rash in the extreme . From these several reasons , namely , the improbability of man having formerly got seven or eight supposed species of pigeons to breed freely under domestication ; these 26 CHAP . I. DOMESTIC PIGEONS .
... to me rash in the extreme . From these several reasons , namely , the improbability of man having formerly got seven or eight supposed species of pigeons to breed freely under domestication ; these 26 CHAP . I. DOMESTIC PIGEONS .
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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