Haeckel 1866 biogenetic law (ontogeny recapitulates phylogeny) overstated; von Baer 1828 four laws (general -> specific) more accurate; pharyngeal-arch homology across vertebrates remains valid.
Haeckel 1866 biogenetic law (ontogeny recapitulates phylogeny) overstated; von Baer 1828 four laws (general -> specific) more accurate; pharyngeal-arch homology across vertebrates remains valid.