On this page: 1  Symptoms of glandular fever. 2  Cause of glandular fever. 3  Diagnosis of glandular fever. 4  Treatment for glandular fever. 5  Where to get help. 6  Things to remember.
A phylogenetic tree, also called and evolutionary tree, is a tree showing the evolutionary relationships among various biological species or other entities that are believed to have a common ancestor of the descendants, and the edge lengths in some tree correspond to time estimates.
For example: However, it is not easy to construct phylogenetic trees and there is often controversy among systematists (a phylogenetic tree is a hypothesis on how a group of organisms might be related). Some organisms that appeared closely related in some respects, may seem more distantly related in other respects.