A) Nutrition
B) Excretion
C) Reproduction
D) Secretionofspicules
Correct Answer: A
Solution :
[a] Digestion in sponges is intracellular like protozoans. It takes place in choanocytes Choanocytes (also called collar cells), are flagellated cells with a collar of protoplasm at the base offlagellum, numbers of which line the internal chambers of sponges of class porifera.
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