The term polytomy refers to a situation in which __________.
ANSWER
there is a branch point on a phylogeny from which more than two descendent groups emerge
any lineages on a phylogeny diverge
a branch point within a phylogenetic tree represents the most recent common ancestor of all the taxa in the tree
separate lineages independently evolve similar structures
multiple common names apply to one speciesthere is a branch point on a phylogeny from which more than two descendent groups emerge