Which extant chordates are postulated to be most like the earliest chordates in appearance?
A) lancelets
B) adult tunicates
C) amphibians
D) chondrichthyans

Question

Quizplus · Accepted Answer

Lancelets are believed to be the closest extant chordates to the earliest chordates in appearance, as they share many characteristics with them, such as the notochord, dorsal nerve cord, and pharyngeal slits. Adult tunicates, amphibians, and chondrichthyans have more specialized adaptations and differ from the earliest chordates in various ways.

Which Extant Chordates Are Postulated to Be Most Like the Earliest