give the characteristics of the following:

Asked by  | 11th Oct, 2008, 03:00: PM

Expert Answer:

 i) Body triploblastic, radially symmetrical, coelomate and unsegmented.

ii) Free-living, marine animals.

iii) A peculiar water vascular system present, used for moving around.

iv) Body covered by spiny, hard, calcareous plates.

vi) Digestive system complete.

vii) Reproduction sexual or asexual.

Answered by  | 11th Oct, 2008, 07:51: PM

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