AIPMT PRELIMS 2010 Zoology Phylum Porifera MCQ Question
Which one of the following statements about all the four of Spongilla, Leech, Dolphin and Penguin is correct?
All are bilaterally symmetrical
Penguin is homoiothermic while the remaining three are poikilothermic
Leech is a freshwater form while all others are marine
Spongilla has special collared cells called choanocytes, not found in the remaining three
Correct Answer
Detailed Explanation
Spongilla belongs to phylum Porifera, in which the characteristic cells are choanocytes, absent in Leech, Dolphin, and Penguin.
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