Q. Which statement is incorrect for animals belonging to class of Chondrichthyes?
A) Presence of placoid scales
B) Absence of air bladder
C) Presence of cartilaginous endoskeleton
D) Notochord is persistent only at larval stage, after that it disappears
Explanation
Animals belonging to class-Chondrichthyes are so called because of the presence of cartilaginous endoskeleton. They lack air bladder thus, swim constantly and have placoid scales, notochord is persistant through out the life
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.