On the Origin of Species by Means of Natural Selection: Or The Preservation of Favoured Races in the Struggle for LifeHumphrey Milford, Oxford University Press, 1923 - 454 páginas |
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Página 22
... habits with the domestic breeds , has not been exter- minated even on several of the smaller British islets , or on the shores of the Mediterranean . Hence the supposed extermination of so many species having similar habits with the ...
... habits with the domestic breeds , has not been exter- minated even on several of the smaller British islets , or on the shores of the Mediterranean . Hence the supposed extermination of so many species having similar habits with the ...
Página 25
... habits and in a great number of points of structure with all the domestic breeds . Secondly , although an English carrier or short - faced tumbler differs immensely in certain characters from the rock- pigeon , yet by comparing the ...
... habits and in a great number of points of structure with all the domestic breeds . Secondly , although an English carrier or short - faced tumbler differs immensely in certain characters from the rock- pigeon , yet by comparing the ...
Página 27
... habit ; but he would be a bold man who would account by such agencies for the differences of a dray and a race horse , a greyhound and bloodhound , a carrier and tumbler pigeon . One of the most remarkable features in our domesticated ...
... habit ; but he would be a bold man who would account by such agencies for the differences of a dray and a race horse , a greyhound and bloodhound , a carrier and tumbler pigeon . One of the most remarkable features in our domesticated ...
Página 35
... habits to man's wants or fancies . We can , I think , further understand the frequently abnormal character of our domestic races , and likewise their differences being so great in external characters and relatively so slight in internal ...
... habits to man's wants or fancies . We can , I think , further understand the frequently abnormal character of our domestic races , and likewise their differences being so great in external characters and relatively so slight in internal ...
Página 36
... habit which is disregarded by all fanciers , as it is not one of the points of the breed . Nor let it be thought that some great deviation of structure would be necessary to catch the fancier's eye : he perceives extremely small ...
... habit which is disregarded by all fanciers , as it is not one of the points of the breed . Nor let it be thought that some great deviation of structure would be necessary to catch the fancier's eye : he perceives extremely small ...
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On the Origin of Species by Means of Natural Selection: or the Preservation ... Charles Darwin Vista previa limitada - 2023 |
Términos y frases comunes
accumulated adapted affinities allied species America amount analogous ancient appear Archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour common parent continuous crossed crustaceans degree difficulty distinct species divergence doubt embryo endemic 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 hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing land larvæ less living male mammals manner Marsupials migration modification modified descendants natural selection naturalists nearly nest oceanic islands offspring organisation perfect pigeons pistil plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary organs seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation vary whole widely