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07/08/2021 8:02 pm
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Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct?
(1) Spongilla has special collared cells called choanocytes, not found in the remaining three
(2) Penguin is homeothermic while the remaining three are poikilothermic
(3) All are bilaterally symmetrical
(4) Leech is a fresh water form while all others are marine
1 Answer
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07/08/2021 8:03 pm
(1) Spongilla has special collared cells called choanocytes, not found in the remaining three