Biology
NULL
Medium
Question
The single main opening of the sponge cavity is ____________?
A
Osculum
✓ Official correct answer
B
Ostia
C
Spongocoel
D
None of these
Community credibility
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A
Osculum
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B
Ostia
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C
Spongocoel
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D
None of these
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Explanation
The osculum is the single large opening through which water exits the central cavity (spongocoel) of a sponge after passing through its filtering system.