On the Origin of Species by Means of Natural Selection, Or, The Preservation of Favoured Races in the Struggle for Life |
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Page vii
... widely different from those of their allies - Organs of extreme perfection - Means of transition - Cases of difficulty - Natura non facit saltum - Organs of small importance - Organs not in all cases absolutely perfect — The law of ...
... widely different from those of their allies - Organs of extreme perfection - Means of transition - Cases of difficulty - Natura non facit saltum - Organs of small importance - Organs not in all cases absolutely perfect — The law of ...
Page 16
... widely in deter- mining what characters are of generic value ; all such valuations being at present empirical . Moreover , on the view of the origin of genera which I shall presently give , we have no right to expect often to 16 CHAP ...
... widely in deter- mining what characters are of generic value ; all such valuations being at present empirical . Moreover , on the view of the origin of genera which I shall presently give , we have no right to expect often to 16 CHAP ...
Page 41
... widely , and will get recognised as something distinct and valu- able , and will then probably first receive a provincial name . In semi - civilised countries , with little free com- munication , the spreading and knowledge of any new ...
... widely , and will get recognised as something distinct and valu- able , and will then probably first receive a provincial name . In semi - civilised countries , with little free com- munication , the spreading and knowledge of any new ...
Page 46
... widely different structure ; and if the plant ceased to produce flowers of the one kind , a great change might perhaps suddenly be effected in the specific character ; but then we do not at present know by what steps , or for what good ...
... widely different structure ; and if the plant ceased to produce flowers of the one kind , a great change might perhaps suddenly be effected in the specific character ; but then we do not at present know by what steps , or for what good ...
Page 53
... widely extended , he will in the end generally be enabled to make up his own mind which to call varieties and which species ; but he will succeed in this at the expense of admitting much variation , and the truth of this admission will ...
... widely extended , he will in the end generally be enabled to make up his own mind which to call varieties and which species ; but he will succeed in this at the expense of admitting much variation , and the truth of this admission will ...
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Common terms and phrases
accumulated adapted affinities allied species America amount analogous ancient animals appear Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo 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 hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living male mammals manner Marsupials migration modification modified descendants mongrels natural selection naturalists nearly nest occasionally offspring organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor racter ranked reciprocal crosses remarked resemble rudimentary organs seeds Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely