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In case of poriferans, the spongocoel is lined with flagellated cells called:

1. oscula
2. choanocytes
3. mesenchymal cells
4. ostia

Correct answer: choanocytes

Solution

In poriferans, the spongocoel is lined by choanocytes, also called collar cells. These cells have a flagellum that drives water flow and a collar that traps food particles.

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