स्पंजों के शरीर पर पाये जा� – McqOptions

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1.	स्पंजों के शरीर पर पाये जाने वाले छोटे-छोटे छिद्र कहलाते हैं-
A.	रेडुला
B.	ट्रेकिया
C.	ऑस्टिया
D.	अस्कूलम
Answer» D. अस्कूलम

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