On The Origin Of SpeciesHarper Collins, 22 июл. 2014 г. - Всего страниц: 336 Published in 1859, The Origin of Species by Charles Darwin introduced the theory of natural selection to a newly-receptive public. As a young naturalist on the second voyage of HMS Beagle (1831-36), Darwin collected many plant and animal specimens, and it was his close examination of them that eventually led to his theories on evolution and natural selection. HarperPerennial Classics brings great works of literature to life in digital format, upholding the highest standards in ebook production and celebrating reading in all its forms. Look for more titles in the HarperPerennial Classics collection to build your digital library. |
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... am fully convincedthat species are not immutable; but that those belongingto what are calledthesame genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of.
... am fully convincedthat species are not immutable; but that those belongingto what are calledthesame genera are lineal descendants of some other and generally extinct species, in the same manner as the acknowledged varieties of.
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... genera originate under nature, it will be seen that we have no rightto expect often to find a generic amountof difference in our domesticated races. In attemptingto estimatethe amount of structural difference between allied domestic ...
... genera originate under nature, it will be seen that we have no rightto expect often to find a generic amountof difference in our domesticated races. In attemptingto estimatethe amount of structural difference between allied domestic ...
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... genera. Isidore Geoffroy St. Hilaire has provedthis inregard to size, and soitis with color, and probably with the length of hair. With respect to fleetness, which depends on many bodily characters, Eclipse was far fleeter, and ...
... genera. Isidore Geoffroy St. Hilaire has provedthis inregard to size, and soitis with color, and probably with the length of hair. With respect to fleetness, which depends on many bodily characters, Eclipse was far fleeter, and ...
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... genera which have been called “protean”or “polymorphic,”in which species present an inordinate amount of variation. With respectto many ofthese forms, hardly two naturalists agree whether to rank them as species orasvarieties. Wemay ...
... genera which have been called “protean”or “polymorphic,”in which species present an inordinate amount of variation. With respectto many ofthese forms, hardly two naturalists agree whether to rank them as species orasvarieties. Wemay ...
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... genera. Under genera, includingthe most polymorphicforms, Mr. Babington gives 251 species, whereas Mr. Bentham gives only112—a difference of 139 doubtful forms! Among animals which unite for each birth, and which are highly locomotive ...
... genera. Under genera, includingthe most polymorphicforms, Mr. Babington gives 251 species, whereas Mr. Bentham gives only112—a difference of 139 doubtful forms! Among animals which unite for each birth, and which are highly locomotive ...
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according adapted admit advantage allied America amount animals appear become believe belonging birds breeds cause certain characters climate closely color common compared complex considerable considered continued crossed descendants developed difficulty distinct domestic doubt effects existing extinct extremely facts favourable fertility flowers formation forms genera genus geological give given greater groups habits Hence hybrids important increase individuals inhabitants inherited insects instance instincts intermediate inthe islands kind known laws less living look manner means modification namely natural selection naturalists nearly observed occasionally occur offspring ofthe onthe organs parent perfect period plants points present preserved principle probably produced remarked represented resemblance respect seeds seems seen separated shown similar single slight sometimes species stage sterility structure successive suppose theory thesame tothe variability variations varieties various vary whole widely young