are the cells that line the spongocoel of the sponges.

Sporocytes

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Flame cells

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Choanocytes

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Oocytes

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Solution

The correct option is C Choanocytes
Choanocytes or collar cells, line the inner surface of the spongocoel and the canal of sponges. These are flagellated cells. They help in creating a flow channel for water in one direction - that is towards the osculum, using their flagella.

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