Q. In molluscs, the space between the visceral hump and the mantle, containing feather-like gills, is called the:
A) Mantle cavity
B) Spongocoel
C) Coelom
D) Gastro-vascular cavity
Explanation
The mantle cavity contains feather-like gills that have respiratory and excretory functions. The spongocoel is the central cavity of sponges.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.