» Write 5 defining features of Phylum - Echinodermata .

1.	» Write 5 defining features of Phylum - Echinodermata .
Answer» 1. They are exclusively marine form .2. They are radially symmetrical .3. The locomotion organ is tube feet based on water vascular system .4. Circulatory system is known as haemal system.5. Examples : starfish (Asteries rubens ) , sea cucumber (Cucumaria frondosa ) 6. Larval form : Bipinaria .

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