Therearesomanylivingthingsandtheyaresodiverseinstructureandbehaviourthatinordertostudythembiologistshavedevelopedclassification(grouping)systems. 　　Scientistsalsoclassifylivingthingsasitallowsthemtostudysimilarfeaturesandtocompareoneorganismwithanother. 　　Scientistsclassifylivingthingssothattheycanstudythedifferentkindswithoutconfusion.Therearebasicdifferencesintheconstructionofeverydifferentkindoflivingthings.Scientistsliketoexaminethosedifferencestolearnmoreabouttheextremecomplexityfoundinthem 　　Iftheyhavelotsoflivingthingstothinkabout,itletsthemputtheminsomesortoforder. 　　Iftheymeetalivingthingtheyhavenevermetbefore,ithelpsthemunderstandwhatthatnewspecieslike. 　　Scientistscanworkouthowcloselyrelatedtwospeciesare.Iftwospecieslookverysimilar,theyareprobablycloselyrelatedtoeachother. 　　Itmakesiteasierforthemtotellotherscientistsaboutaparticularspecies. 　　Classificationmeansorganisingthingsintogroupsthatsharethesamesortsoffeatures.Sciencehasdevelopedaclassificationsystembecausethismakesiteasiertoidentify,describeandrememberthings.