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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... insects under the bark of trees. Inthe case of the mistletoe, which drawsits nourishment from certain trees,which has seeds that mustbe transported by certain birds,andwhich hasflowers with separate sexes absolutely requiring the agency ...
... insects under the bark of trees. Inthe case of the mistletoe, which drawsits nourishment from certain trees,which has seeds that mustbe transported by certain birds,andwhich hasflowers with separate sexes absolutely requiring the agency ...
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... insect, shows us what singular modifications might result in the case ofplants froma chemical change in the nature of the sap. Indefinite variabilityisa muchmore common result ofchanged conditions than definite variability, and has ...
... insect, shows us what singular modifications might result in the case ofplants froma chemical change in the nature of the sap. Indefinite variabilityisa muchmore common result ofchanged conditions than definite variability, and has ...
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... insect would have been variable in the same species; it might have been thought that changes of this nature could have ... insects are far from uniform. Authors sometimesargue ina circle when theystate that important organsnever vary ...
... insect would have been variable in the same species; it might have been thought that changes of this nature could have ... insects are far from uniform. Authors sometimesargue ina circle when theystate that important organsnever vary ...
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... insects,andin the immature and larval states of many of the lower animals. There are, also, cases of dimorphism andtrimorphism, both with animalsandplants. Thus,Mr. Wallace, whohas lately called attention tothe subject,has shownthatthe ...
... insects,andin the immature and larval states of many of the lower animals. There are, also, cases of dimorphism andtrimorphism, both with animalsandplants. Thus,Mr. Wallace, whohas lately called attention tothe subject,has shownthatthe ...
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... insects live on one kind of plant or on onegroup of plants;somefeed indiscriminately on manykinds, but donotin consequence vary.In severalcases, however, insects found livingon different plants,havebeen observed byMr. Walsh to present ...
... insects live on one kind of plant or on onegroup of plants;somefeed indiscriminately on manykinds, but donotin consequence vary.In severalcases, however, insects found livingon different plants,havebeen observed byMr. Walsh to present ...
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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