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OpenStudy (anonymous):
What is a trait that is ancestral to all chordates? A. a jaw bone B. a notochord C. an amniotic egg D. a vertebral column
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OpenStudy (shreehari499):
Hi @Absullum444 ! The trait that is ancestral to all chordates is the presence of a notochord...the others are gill slits and nerve chord..:)
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