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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