d 
 for your data. For more information on defining groups, see the Tutorial 
 labeled “Managing <a href="javascript:TextPopup(this)" id="HotSpot31545" class="glossterm">Taxa</a><script type="text/javascript">//<![CDATA[
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//]]></script><span class="glosstext" id="POPUP31545" style="display: none;"> A taxon is the individual unit whose evolutionary relationship is being investigated.  Depending on the study, “taxa” may refer to species, populations, individua