A) Thesocytes
B) Collar cells
C) Pinacocytes
D) Sclerocytes
Correct Answer: B
Solution :
Collar cells or choanocytcs are useful for feeding in sponge. The flagella of choanocytes constantly beat to creat a current of water alongwith the water current food material enter into central spongocoel. The choanocytes also digest the food.
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