Q. Shell of molluscs is derived from
A) Foot
B) Mantle
C) Ctenidia
D) Placoid
Explanation
Molluscs are the soft bodied, unsegmented animals covered by a shell. In between the shell and body wall is a covering called mantle, which secretes the shell.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.