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* ***Node*** These are the points where individual branches end. In the internal parts of a pahylogenetic tree, single branches can "split" producing multiple descendant branches. The point are which the branches split is known as an internal node. If a branch ends at a taxon, the end point is known as a "terminal node".   A key part of interpreting phylogenetic trees lies in understanding the groupings of taxa in a tree. Some terms relating to this are below:  ***Clade*** A clade is a group of organism that share a common ancestor to the . Every node in the tree defines a unique clade.