BSC 108 Study Guide - Final Guide: Sympatric Speciation, Allopatric Speciation, Species
9 May 2017
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Artificial selection: selection that maintains a variation for a particular trait within a narrow range, stabilizing selection, who is the author of the publication (cid:498)on the origin of species by means of. Natural selection(cid:499): charles darwin, hedgehogs and porcupines both have quills. These features are examples of what type of defense mechanism: mechanical defense, due to changes in water flow, a small, easily crossable stream becomes a wide, fast-flowing river that is difficult to cross. A raccoon population was split, with some individuals living on each side of the river. Over time, small changes in the phenotypes of the populations on each side of the river were observed and individuals from the two sides were unable to reproduce successfully. In some zoos, rare crosses between male lion and a female tiger have produced hybrid offspring called ligers. Male ligers are sterile but some female ligers are fertile.
