Chapter 17, Problem 9RQ

Summary Introduction

To review:

The basis of the phylogenetic tree and the unrooted nature of the fundamental tree of life at the divergence of Archaea, eukarya, and bacteria.

Introduction:

A branching diagram that shows evolutionary relationships among various species represents a phylogenetic or an evolutionary tree. In a tree where the direction of the ancestral relationship is determined based on one of the nodes specified as the root is called a rooted tree whereas an unrooted tree has no pre-determined root and thus, possesses no hierarchy.