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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... seeds that mustbe transported by certain birds,andwhich hasflowers with separate sexes absolutely requiring the agency of certain insectstobring pollen from one flower to the other, it is equally preposterous to account for the ...
... seeds that mustbe transported by certain birds,andwhich hasflowers with separate sexes absolutely requiring the agency of certain insectstobring pollen from one flower to the other, it is equally preposterous to account for the ...
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... seed! In some few cases it has been discovered that a very trifling change, such as a littlemoreorless waterat some particular periodof growth, will determine whether ornot aplant will produce seeds. I cannot here give the details which ...
... seed! In some few cases it has been discovered that a very trifling change, such as a littlemoreorless waterat some particular periodof growth, will determine whether ornot aplant will produce seeds. I cannot here give the details which ...
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... seed. They occur rarely under nature, butare far from rare under culture. As a single budout ofmany thousands produced year after year on the same tree underuniform conditions,has been known suddenly to assume anew character; andas ...
... seed. They occur rarely under nature, butare far from rare under culture. As a single budout ofmany thousands produced year after year on the same tree underuniform conditions,has been known suddenly to assume anew character; andas ...
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... seed raisers do not pickoutthebest plants, but merely goover their seedbeds, and pull up the “rogues,” as they callthe plants that deviate from the proper standard. With animals this kind of selection is, infact, likewisefollowed ...
... seed raisers do not pickoutthebest plants, but merely goover their seedbeds, and pull up the “rogues,” as they callthe plants that deviate from the proper standard. With animals this kind of selection is, infact, likewisefollowed ...
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... seed of a wild pear, though he might succeed from a poor seedling growing wild, if it had come from a gardenstock ... seeds, and, when a slightly better variety chanced to appear, selecting it,and so onwards.But the gardenersofthe ...
... seed of a wild pear, though he might succeed from a poor seedling growing wild, if it had come from a gardenstock ... seeds, and, when a slightly better variety chanced to appear, selecting it,and so onwards.But the gardenersofthe ...
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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