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 9
... 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 Unity ...
... 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 Unity ...
Page 16
... widely and is very numerous , and why another allied species has a narrow range and is rare ? Yet these relations are of the highest importance , for they determine the present welfare , and , as I believe , the future success and ...
... widely and is very numerous , and why another allied species has a narrow range and is rare ? Yet these relations are of the highest importance , for they determine the present welfare , and , as I believe , the future success and ...
Page 26
... widely in determining 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 meet with ...
... widely in determining 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 meet with ...
Page 45
... widely , and will get recognised as something distinct and valuable , and will then probably first receive a provincial name . In semi - civilised countries , with little free communication , the spreading and knowledge of any new sub ...
... widely , and will get recognised as something distinct and valuable , and will then probably first receive a provincial name . In semi - civilised countries , with little free communication , the spreading and knowledge of any new sub ...
Page 50
... 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 ...
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Common terms and phrases
accumulated adapted affinities allied species America analogous ancient animals appear archipelago 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 existing exterminated extinct extremely facts favourable fertilised 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 increase individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ laws less living males mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally offspring organic organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary seeds sexual sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory variability variations varieties vary whole widely