| (i) They are aquatic, mostly marine, sessile or free- swimming, 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. |
A) (i) and (ii)
B) (i) and (iv)
C) (i), (ii) and (iii)
D) All of these
Correct Answer: C
Solution :
[c] 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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