Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?
Held on 30 Apr 2010 · Verified 9 Jul 2026.
Penguin is homoiothermic while the remaining three are poikilothermic
Leech is a fresh water form while all others are marine
Spongilla has special collared cells called choanocytes, not found in the remaining three
All are bilaterally symmetrical
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