question: What were the earliest vertebrates who has relatives today?
choices.text: snails humans lynx ferns cows Fish Type O cats
choices.label: A B C D E F G H
fact2: Descendants of the early jawless fish are present today in the lampreys and hagfishes.
combinedfact: The earliest vertebrates were jawless fish
formatted_question: What were the earliest vertebrates who has relatives today? (A) snails (B) humans (C) lynx (D) ferns (E) cows (F) Fish (G) Type O (H) cats