Question

what are the locomotor organs in echinoderms ? what are their general characteristics?

Answer 1

Most commonly Echinoderms use tube feet as their locomotory organ. But some of them use their spines also.
General characteristics of echinoderms-
1. They are characterised by radial symmetry.
2. They have remarkable power of regeneration of tissues, organs etc.
3. They have ossified skeletons.
4. They are exclusively marine.