Q. Which of the following vertebrates show the formation of middle ear (eustachian recess) for the first time?
A) Exocoetus
B) Rana
C) Echis
D) Hippocampus
Explanation
Amphibians (i.e., Rana) show the formation of middle ear for the first time.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.