Читать книгу Principles of Microbial Diversity - James W. Brown - Страница 66

Branches are the connections between nodes in the tree. They represent the evolutionary pathways between common ancestors (internal nodes) and modern organisms (terminal nodes). The lengths of these branches are defined by the scale; each branch represents a certain length of historical time if time is the scale used in the tree, or a certain amount of evolutionary change if evolutionary distance is the scale used in the tree.