Which of the following are also known as 'collar cells'?

Choanocytes

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Pinocytes

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Thesocytes

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Cnidoblast

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Solution

The correct option is A Choanocytes
Choanocytes also known as 'collar cells' are distinctive cells line the interior body walls of sponges. These cells have a central flagellum that is surrounded by a collar of microvilli. They form choanoderm, a type of cell layer found in sponges.
So, the correct answer is option A.

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