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kramer
3 years ago
13

Which of the following is NOT a characteristic shared by all chordates?

Biology
1 answer:
Dvinal [7]3 years ago
4 0
I believe this is a bit of a trick question, while you are right about both B and D, they both preexist they just develop into other structures. I believe the correct answer is A since the nerve cord is hollow not solid. 
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