What evidence has enabled scientists to infer the order in which vertebrate groups envolved?

Scientists have inferred the evolutionary order of vertebrate groups through a combination of fossil records, comparative anatomy, and molecular phylogenetics. Fossils provide chronological evidence of when different groups appeared, while similarities and differences in anatomical features help establish evolutionary relationships. Additionally, genetic analysis allows researchers to assess the genetic divergence among species, providing insights into their evolutionary timelines. Together, these lines of evidence create a clearer picture of vertebrate evolution.