Before revision:  Nonetheless, it has been argued that evolution is fundamentally tree-like , in the sense that it can be modeled by a tree with additional arcs. Phylogenetic networks with this property are called tree-based, and this concept has recently attracted significant attention in evolutionary research. But classifying networks into tree-based and non-tree-based ones is usually not sufficient for biological purposes, because sometimes tree-basedness is missed merely due to incomplete sampling.
After revision:  Nonetheless, it has been argued that evolution is fundamentally tree-like '' evolution. A given non-tree-based ones is usually not sufficient for biological purposes, because sometimes tree-basedness is missed merely due to incomplete sampling.