Biology, 18.11.2019 20:31 jane078

This phylogenetic hypothesis shows the major clades of chordates in relation to the other main deuterostome clade, echinodermata. derived characters are listed for selected clades; for example, only gnathostomes have a jaw. in some lineages, derived traits have been lost over time or occur in reduced form; hagfishes and lampreys, for example, are vertebrates with reduced vertebrae.
based on this phylogeny, which vertebrate groups would you expect to have lungs or lung derivatives?

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This phylogenetic hypothesis shows the major clades of chordates in relation to the other main deute...