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| 1. |
In most simple type of canal system of porifera, water flows through which one of the following waysA. Ostia `to` Spongocoel `to` Osculum `to` ExteriorB. Spongocoel `to` Ostia `to` Osculum `to` ExteriorC. Osculum `to` Spongocoel `to` ExteriorD. Osculum `to` Ostia `to` Spongocoel `to` Exterior |
| Answer» Correct Answer - A | |