Question
Mollusca and Echinodermata

Answer

 Mollusca Echinodermata
(i) Molluscs are soft bodied and slimy.(i) The body is rough with calcareous spines.
(ii) Body shows bilateral symmetry.(ii) Body show radial symmetry in adult stage.
(iii) They are either marine or fresh water animals.(iii) They are exclusively marine animals.
(iv) Locomotion with ventral foot.(iv) Locomotion with tube feet.

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