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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... offspring of individuals exposed to certain conditions during severalgenerations are modifiedinthe same manner. It is extremelydifficult tocome toany conclusionin regard to the extent ofthe changes which have been thusdefinitely induced ...
... offspring of individuals exposed to certain conditions during severalgenerations are modifiedinthe same manner. It is extremelydifficult tocome toany conclusionin regard to the extent ofthe changes which have been thusdefinitely induced ...
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... offspring somewhat unlike their parents. I may addthatas some organisms breed freely under the most unnatural conditions—for instance, rabbits and ferrets kept in hutches—showing thattheir reproductive organs are not easily affected ...
... offspring somewhat unlike their parents. I may addthatas some organisms breed freely under the most unnatural conditions—for instance, rabbits and ferrets kept in hutches—showing thattheir reproductive organs are not easily affected ...
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... offspring ata corresponding age, though sometimes earlier. Inmany casesthis could notbe otherwise; thus the inherited peculiarities in the horns of cattle could appear only in the offspring when nearly mature; peculiarities ...
... offspring ata corresponding age, though sometimes earlier. Inmany casesthis could notbe otherwise; thus the inherited peculiarities in the horns of cattle could appear only in the offspring when nearly mature; peculiarities ...
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... offspring at the same period at which it first appearedinthe parent.I believe this rule to be ofthehighest importance in explaining the laws of embryology. These remarks are of course confined to the first APPEARANCE of the peculiarity ...
... offspring at the same period at which it first appearedinthe parent.I believe this rule to be ofthehighest importance in explaining the laws of embryology. These remarks are of course confined to the first APPEARANCE of the peculiarity ...
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... offspring ofany single species, then such facts would have great weight in making us doubt about the immutability ofthemany closelyallied natural species—for instance,ofthe many foxes—inhabiting the different quarters of the world. I do ...
... offspring ofany single species, then such facts would have great weight in making us doubt about the immutability ofthemany closelyallied natural species—for instance,ofthe many foxes—inhabiting the different quarters of the world. I do ...
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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