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Which one of the following statements ab...

Which one of the following statements about all the four of spongilla, leech, dolphin and penguin is correct ?

A

Penguin is homoeothermic while the remaining three are poikilothermic.

B

Leech is a freshwater form while all others are marine.

C

Spongilla has special collared cells called choanocytes, not found in the remaining three.

D

All of them shows bilateral symmetry.

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The correct Answer is:
C
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