Which of the following is a characteristic of all chordates?
A) They all have vertebral columns.
B) They all exhibit radial symmetry.
C) They all have a notochord sometime during the life cycle.
D) They all have an exoskeleton sometime during the life cycle.

Question

Quizplus · Accepted Answer

The notochord is a defining characteristic of chordates, present at some point during their life cycle. While many chordates do have vertebral columns, this is not true for all of them (such as the tunicates), so choice A is incorrect. Radial symmetry is not a characteristic of chordates, making choice B incorrect. Exoskeletons are not a characteristic of chordates either, making choice D incorrect.

Which of the Following Is a Characteristic of All Chordates