In Porifera, Ostia is an opening through which ____________
A. Waters enters into the sponges
B. Water leaves the sponges
C. It is a series of small openings
D. Both A and C
Answer:A
In Porifera, Ostia is an opening through which ____________
A. Waters enters into the sponges B. Water leaves the sponges C. It is a series of small openings D. Both A and C