Tube feet are the characteristic structures of

Assertion : Ambulacral system plays a major role in locomotion of echinoderm.
Reason : Hydraulic pressure of fluid and contraction of muscle of tube feet make possible movement of echinoderm.

Which of the following is a unique characteristic of the phylum Echinodermata?

Mark the correct combination of Phylum,Class,and Example.

Animals that exhibit bilateral symmetry in the larval stage and radial (pentamerous) symmetry in the adult stage belong to the phylum:

Which organism exhibits a body divided into five arms (pentamerous symmetry)?