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| 1. |
Sponges are multicellular organisms yet they have no respiratory organs. This is due to the reason thatA. the nmode of respiration is anaerobic.B. presence of highly porous body through which water flows.C. limited reqiurement of oxygen, neglecting need of separate system for respirationD. the respiratory organs become non-functional in marine water |
| Answer» Correct Answer - B | |