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![]() Date: 2012-09-04 15:41:02Physidae Planorbella trivolvis Gastropods Freshwater snail Crayfish Optimal foraging theory Antipredator adaptation Predation Physella Phyla Protostome Planorbella | Source URL: www.biosurvey.ou.eduDownload Document from Source WebsiteFile Size: 705,87 KBShare Document on Facebook |