On the Origin of Species by Means of Natural Selection: Or the Preservation of Favoured Races in the Struggle for Life |
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One of the most important works in history, great to see it shared for free on google books!
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according action adapted advantage allied America amount ancient animals appear become believe birds breeds cause characters climate closely colour common considered continuous crossed descendants developed difficulty distinct domestic doubt Edition effected existing extinct extremely facts families favourable fertility flowers follow formation forms genera genus give given greater groups habits hand Hence HISTORY hybrids important increase individuals inhabitants inherited insects instance instincts intermediate islands kinds known land laws less living look males manner means modified namely natural selection naturalists nearly never observed occur offspring organic origin parent perfect period plants points present principle probably produced range ranked recently remains remarked seeds seems seen separated shown similar single slight sometimes species sterility structure successive suppose tend theory tion variability variations varieties various vary vols whole widely young