Forget all the pop science ballyhoo, and if you should not trust my word, just check the provided primary sources.
Doolittle predicts, from an evolutionary framework, that jawless vertebrates would have a simpler blood clotting cascade than the human system.
Ewert’s model represents a valuable tool in the developing theory of biological design, which should eventually supplant phylogenetic analyses.
This is hierarchical organization, none of which is seen in the Precambrian layers beneath.
We regard Kojonen’s model as nuanced, erudite, and fair-minded. It is a model of fine scholarship and deserves serious attention.