Use the diagram to answer the question.
Based on the diagram, which statement is true about the evolution of animals?
A. Echinoderms evolved after chordates.
B. Mineralized skeletons developed before notocords.
C. Chrondricthyes share chordate ancestors with myxini.
D. The ancestral deutrosome had a notocord and vertebrae.
1 answer
D. The ancestral deutrosome had a notocord and vertebrae.