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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

All are bilaterally symmetrical

B

Penguin s homeothermic while the remaining three are poikilothermic.

C

Leech is a fresh water form while all others are marine

D

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

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The correct Answer is:
d
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