On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeD. Appleton, 1909 - 430ÆäÀÌÁö |
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19 ÆäÀÌÁö
... look to the individuals of the same variety or sub - variety of our older cultivated plants and animals , one of the first points which strikes us , is , that they generally differ more from each other than do the individuals of any one ...
... look to the individuals of the same variety or sub - variety of our older cultivated plants and animals , one of the first points which strikes us , is , that they generally differ more from each other than do the individuals of any one ...
24 ÆäÀÌÁö
... look at the inheritance of every character whatever as the rule , and non - inheritance as the anomaly . The laws governing inheritance are quite unknown ; no one can say why a peculiarity in different individuals of the same species ...
... look at the inheritance of every character whatever as the rule , and non - inheritance as the anomaly . The laws governing inheritance are quite unknown ; no one can say why a peculiarity in different individuals of the same species ...
26 ÆäÀÌÁö
... look to the hereditary varieties or races of our domestic animals and plants , and compare them with closely allied species , we generally perceive in each domestic race , as already remarked , less uniformity of character than in true ...
... look to the hereditary varieties or races of our domestic animals and plants , and compare them with closely allied species , we generally perceive in each domestic race , as already remarked , less uniformity of character than in true ...
33 ÆäÀÌÁö
... look in vain throughout the whole great family of Columbid©¡ for a beak like that of the English carrier . or that of the short - faced tumbler , or barb ; for reversed feathers like those of the Jacobin ; for a crop like that of the ...
... look in vain throughout the whole great family of Columbid©¡ for a beak like that of the English carrier . or that of the short - faced tumbler , or barb ; for reversed feathers like those of the Jacobin ; for a crop like that of the ...
37 ÆäÀÌÁö
... purposes , or so beautiful in his eyes , we must , I think , look further than to mere variability . We cannot suppose that all the breeds 66 " " were suddenly produced as perfect and as useful as we SELECTION BY MAN 37.
... purposes , or so beautiful in his eyes , we must , I think , look further than to mere variability . We cannot suppose that all the breeds 66 " " were suddenly produced as perfect and as useful as we SELECTION BY MAN 37.
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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 larv©¡ 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