alleryCellular organisation, choanocytes and a spicule or spongin skeleton indicate:
APorifera
BCnidaria
CMollusca
DAnnelida
Answer & Solution
Correct answer: A. Porifera
Porifera have cellular-level organisation, choanocytes lining canals, and a skeleton of spicules or spongin. Water enters ostia, passes through the spongocoel and leaves the osculum; digestion is intracellular.
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