Sister taxa Sister taxa represent a polytomy. represent the common ancestor of taxa. diverge from all other lineages early in the history of the group. represent groups of organisms that share an immediate common ancestor.

Respuesta :

Answer:

To find the most recent common ancestor of a set of taxa on a phylogeny tree, follow each taxon's lineage back in time (towards the base of the tree) until all the lineages meet up. That node represents their most recent common ancestor.

Explanation: