Question

Observe the figure and answer the following questions.

(a) To which phylum these organisms belong? 

(b) Name the substance with which their body is covered.

(c) Name their organs of locomotion.

Answer 1

(a) The starfish and the sea urchin shown in the figure belong to phylum Echinodermata.

(b) The body of echinoderm animal is covered with calcareous spines or ossicles/plates.

This is the substance covering the body is mostly calcium salts and compounds.

(c) Their locomotory organs are tube feet.