On an evolutionary tree,any group that includes a common ancestor and all of its descendants is called monophyletic ("one-tribe").Recall the current evolutionary tree for Bacteria,Archaea,and Eukarya.According to this tree,are all organisms alive today monophyletic?

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All organisms alive today are monophyletic, as they all have a common ancestor that is represented by the root of the evolutionary tree.

On an Evolutionary Tree,any Group That Includes a Common Ancestor