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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... cause of variation. In one limited sense, as we shall hereafter see,this may be true; butitis preposterousto attribute tomereexternal conditions,the structure,forinstance, ofthe woodpecker, withitsfeet, tail,beak, and tongue, so ...
... cause of variation. In one limited sense, as we shall hereafter see,this may be true; butitis preposterousto attribute tomereexternal conditions,the structure,forinstance, ofthe woodpecker, withitsfeet, tail,beak, and tongue, so ...
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... causes much extinction of the less improved forms of life, and leads to what I have called divergence of character.In the next chapterIshall discuss the complexand littleknown lawsof variation.Inthe five succeeding chapters,themost ...
... causes much extinction of the less improved forms of life, and leads to what I have called divergence of character.In the next chapterIshall discuss the complexand littleknown lawsof variation.Inthe five succeeding chapters,themost ...
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Charles Darwin. C H A P T E R I. Variation. Under. Domestication. CAUSES OF VARIABILITY When we compare the individuals of the ... cause any great amount ofvariation; andthat,when theorganisation has once beguntovary, it generally continues ...
Charles Darwin. C H A P T E R I. Variation. Under. Domestication. CAUSES OF VARIABILITY When we compare the individuals of the ... cause any great amount ofvariation; andthat,when theorganisation has once beguntovary, it generally continues ...
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... cause; and if the same cause were to act uniformly during a long series of generations on many individuals, all probably would be modifiedin thesame manner. Such facts as the complex and extraordinary outgrowths which variably follow ...
... cause; and if the same cause were to act uniformly during a long series of generations on many individuals, all probably would be modifiedin thesame manner. Such facts as the complex and extraordinary outgrowths which variably follow ...
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... causing coughs or colds, rheumatism, or inflammation of various organs. Withrespectto whatI havecalled the indirect actionof changedconditions, namely,through the reproductive systemof being affected, we may infer that variability is ...
... causing coughs or colds, rheumatism, or inflammation of various organs. Withrespectto whatI havecalled the indirect actionof changedconditions, namely,through the reproductive systemof being affected, we may infer that variability is ...
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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