On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeJ. Murray, 1860 - 502페이지 This is the 'second edition' of Darwin's Origin of Species. |
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14 페이지
... Hence it has been argued that no deductions can be drawn from domestic races to species in a state of nature . I have in vain endeavoured to discover on what decisive facts the above statement has so often and so boldly been made ...
... Hence it has been argued that no deductions can be drawn from domestic races to species in a state of nature . I have in vain endeavoured to discover on what decisive facts the above statement has so often and so boldly been made ...
23 페이지
... Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domes- ticated , and yet be unknown to ornithologists ; and this , considering their size , habits , and remarkable characters ...
... Hence the supposed aboriginal stocks must either still exist in the countries where they were originally domes- ticated , and yet be unknown to ornithologists ; and this , considering their size , habits , and remarkable characters ...
24 페이지
... Hence the supposed ex- termination of so many species having similar habits with the rock - pigeon seems to me a very rash assump- tion . Moreover , the several above - named domesticated breeds have been transported to all parts of the ...
... Hence the supposed ex- termination of so many species having similar habits with the rock - pigeon seems to me a very rash assump- tion . Moreover , the several above - named domesticated breeds have been transported to all parts of the ...
39 페이지
... goose has not given rise to any marked varieties ; hence the Thoulouse and the common breed , which differ only in colour , that most fleeting of characters , have lately been exhibited as CHAP . I. 39 SELECTION BY MAN .
... goose has not given rise to any marked varieties ; hence the Thoulouse and the common breed , which differ only in colour , that most fleeting of characters , have lately been exhibited as CHAP . I. 39 SELECTION BY MAN .
41 페이지
... hence this comes to be of the highest importance to success . On this principle Marshall has remarked , with respect to the sheep of parts of Yorkshire , that " as they generally belong to poor people , and are mostly in small lots ...
... hence this comes to be of the highest importance to success . On this principle Marshall has remarked , with respect to the sheep of parts of Yorkshire , that " as they generally belong to poor people , and are mostly in small lots ...
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accumulated adapted affinities allied species America amount analogous ancient animals appear 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 hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons plants pollen present probably produced progenitor racters ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely