Traditionally, annelids and arthropods were viewed as
Chapter 33, Problem 33.15(choose chapter or problem)
Traditionally, annelids and arthropods were viewed as closely related because both have body segmentation. Yet DNA sequence data indicate that annelids belong to one clade (Lophotrochozoa) and arthropods to another (Ecdysozoa). Could traditional and molecular hypotheses be tested by studying the expression of Hox genes that control body segmentation (see Concept 21.6, pp. 442447)? Explain.
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