Question

What is peculiar of phylum echinodermata?​

Answer 1

Answer:

1)They are star like,spherical or elongated. 2)Body is triploblastic,coelomate,unsegmented,radially symmetrical. 3)Body lacks heads but has oral surfaces. 4)The body wall is covered by spiny hard calcium carbonate plates forming a rigid endoskeleton. 5)Excretory organs absent.

Answer 2

Answer:

1)They are star like,spherical or elongated. 2)Body is triploblastic,coelomate,unsegmented,radially symmetrical. 3)Body lacks heads but has oral surfaces. 4)The body wall is covered by spiny hard calcium carbonate plates forming a rigid endoskeleton. 5)Excretory organs absent.