Blistering can also be a symptom of certain infections: 1  Impetigo is a bacterial infection of the skin that can occur in both children and adults, and sometimes shows up after a viral infection. 2  Blisters are a symptom of impetigo. 3  Chickenpox is an infection caused by a virus.
Family trees are a genealogical tool which records information from searches into family history. It is intended to give an overview of any given family either as far back as they can be researched or the family name originates. It shows which people belong to the family by adding them on to different 'branches'.
Cladogram (family tree) of a large biological group, showing the last common ancestor of the composite tree, which is the vertical line 'trunk' at the bottom. A clade located within a clade is said to be nested within that clade. 2  In the diagram, the hominoid clade, the apes and humans, is nested within the primate clade. 3  Two clades are sisters if they have an immediate common ancestor. 4  In the diagram, lemurs and lorises are sister clades.