What do echinoids lack?
characteristics centralized nervous system permineralization the body's largest organ biological diversity that material's properties aerobic capacity organic matter
A B C D E F G H
Another group of echinoderms are the echinoids.
echinoids lack a centralized nervous system
What do echinoids lack? (A) characteristics (B) centralized nervous system (C) permineralization (D) the body's largest organ (E) biological diversity (F) that material's properties (G) aerobic capacity (H) organic matter