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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... character from thatof the otherbuds on the same plant. These bud variations, as they may benamed,can be propagated bygrafts, offsets, etc., and sometimes by seed. They occur rarely under nature, butare far from rare under culture. As a ...
... character from thatof the otherbuds on the same plant. These bud variations, as they may benamed,can be propagated bygrafts, offsets, etc., and sometimes by seed. They occur rarely under nature, butare far from rare under culture. As a ...
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... character to their aboriginal stocks.Hence it has been argued that no deductions can be drawn from domestic races to ... characters to ancestral forms, it seems to menot improbable that if we could succeed in naturalising, or wereto ...
... character to their aboriginal stocks.Hence it has been argued that no deductions can be drawn from domestic races to ... characters to ancestral forms, it seems to menot improbable that if we could succeed in naturalising, or wereto ...
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... characters, whilekept under the sameconditions and while kept in a considerable body,so that freeintercrossing might ... CHARACTER OF DOMESTIC VARIETIES; DIFFICULTY OF DISTINGUISHING BETWEEN VARIETIES AND SPECIES; ORIGIN OF DOMESTIC ...
... characters, whilekept under the sameconditions and while kept in a considerable body,so that freeintercrossing might ... CHARACTER OF DOMESTIC VARIETIES; DIFFICULTY OF DISTINGUISHING BETWEEN VARIETIES AND SPECIES; ORIGIN OF DOMESTIC ...
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... characters of generic value. It can be shown thatthis statement is not correct; butnaturalists differmuch in determining what charactersareof generic value;allsuch valuationsbeing at present empirical. When it is explained how genera ...
... characters of generic value. It can be shown thatthis statement is not correct; butnaturalists differmuch in determining what charactersareof generic value;allsuch valuationsbeing at present empirical. When it is explained how genera ...
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... characters be ever so slight, has had itswild prototype. Atthis rate there musthave existed at least ascore of species ofwild cattle,as many sheep,and several goats,in Europe alone, andseveral evenwithin Great Britain. One author ...
... characters be ever so slight, has had itswild prototype. Atthis rate there musthave existed at least ascore of species ofwild cattle,as many sheep,and several goats,in Europe alone, andseveral evenwithin Great Britain. One author ...
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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