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Coelenterata Ctenophora - Questions and Answers

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351. Coral reef is formed of
A. Siliceous matter
B. Limestone
C. Chitin
D. Lava
Explanation:
352. Tentacles are absent in
A. Beroe
B. Ctenoplana
C. Hormiphora
D. Obelia
Explanation:
353. Anal pores occur in gastrovascular system of
A. Physalia
B. Corals
C. Aurelia
D. Ctenophores
Explanation: