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OpenStudy (anonymous):
Which best describes organisms of the Precambrian era? A. land plants and animals B. dinosaurs and primitive mammals C. single-celled organisms and soft, boneless animals D. ferns and flying reptiles
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OpenStudy (anonymous):
Fan & Medal!!! :)
OpenStudy (shadeyghost):
http://openstudy.com/study#/updates/537a03dfe4b0ba022d37847e you should check other openstudy questions before asking tho
OpenStudy (anonymous):
Thanks :P
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