Practice question

Phylogenetic classification arranges taxa according to inferred common ancestry and evolutionary divergence using shared derived characters, fossil stratigraphy and now molecular phylogenomics to reconstruct tree topology with branch lengths. It rejects groupings based on economic traits alphabetical order or habitat similarity which are artificial empirical utilitarian. Engler and Prantl provided first major phylogenetic system for plants emphasizing evolutionary progression from simple to complex, later APG based on DNA. Such classification predicts genetic similarity, evolutionary timing, supports monophyly principle, explains biogeography by vicariance and dispersal, guiding conservation priorities based on evolutionary distinctiveness and lineage age rather than superficial resemblance.