Which of the following statement(s) is/are correct regarding phylum coelenterata?
(i) They are aquatic, mostly marine, sessile or freeswimming, radially symmetrical animals.
(ii) They have a central gastro-vascular cavity with a single opening called hypostome. (iii) Digestion is extracellular and intracellular.
(iv) Examples are Sycon, Spongilla and Euspongia.
Text Solution
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Sycon, Spongilla and Euspongia are examples of phylum Porifera. Physalia, Adamsia, Pennatula, Gorgonia and Meandrina are examples of phylum coelenterata (Cnidaria).
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