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Question

Collar cells occur in

A
Sponges
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B
Hydra
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C
Sandworm
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D
Star fish
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Solution

The correct option is A Sponges
Collar cells occur in sponges and are located at the anterior end of each choanocyte. Choanocytes or collar cells line the spongocoel and the canals in these animals. These cells help in filtering nutrients from the water entering their body by the continuous movement of water.
Hence the correct option is A.

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