Question

......... is a chordate but not a vertebrate.

• A. Shark
• B. Lamprey eel
• C. Turtle
• D. Tunicate
• E. None of the above

Answer 1

The correct option is D Tunicate

Tunicate is a chordate but not a vertebrate because it is included in subphyla Urochordate of Phylum Chordata. In Urochordates, the notochord is present only in the larval tail while in the vertebrates, the notochord is present only in the embryonic period. It is replaced by a vertebral column in the adults.

Thus, all vertebrates are chordates but not all chordates are vertebrates.

So, 'Tunicate' is the correct answer.