In which of these the perisarc forms shelf like ring in Obelia: Phylum Cnidaria or Coelentrata Mcqs August 28, 2019 BILAL KHATTAK0 A.Hydranth B.Blastostyles C.Both (a) & (b) D.None of these Related Mcqs: In blastostyles the perisarc forms: Obelia colony has: The moment of inertia of a thin ring about an axis perpendicular to plane of ring is Colony of Obelia is: Medusa of Obelia is: Hydranths in Obelia colony are: Tentacles in Obelia polyp are: Chitinous covering ocer the colony of Obelia is: Continental shelf is the: Continental shelf is a :
