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.
Most phylogenetic trees are rooted, meaning that one (which is usually unlabeled) corresponds to the common ancestor of all the species included in the tree. Note, however, that a tree can be drawn in any orientation. Figure 3, for example, shows a simple with the root at the bottom and the tips at the top.