Which statement is NOT true? a. All chordates have notochords. b. All chordates have pharyngeal pouches or slits. c. All chordates have dorsal tubular nerve cords. d. All chordates are vertebrates.

Which statement is NOT true?

a.    All chordates have notochords.

b.    All chordates have pharyngeal pouches or slits.

c.    All chordates have dorsal tubular nerve cords.

d.    All chordates are vertebrates.

e.    Chordates are found in all major types of environments.

Ans: All chordates are vertebrates.