Multiple choice

Which of the following is not a vertebrate?

  1. Oryctolagus

  2. Fish

  3. Sparrow

  4. Amphioxus

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Amphioxus (lancelet) is a chordate but not a vertebrate - it lacks a true vertebral column (backbone). It belongs to the subphylum Cephalochordata, which retains the primitive chordate characteristics (notochord, dorsal nerve cord, pharyngeal slits, post-anal tail) but never develops vertebral elements. Oryctolagus (rabbit), Fish, and Sparrow are all vertebrates.

Keep practicing — related questions