McqMate
| Q. |
What is a Sponge? |
| A. | A fungus |
| B. | A fossil |
| C. | A plant |
| D. | An animal |
| Answer» D. An animal | |
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Explanation: Sponges are animals of the phylum Porifera. They are multicellular organisms which have bodies full of pores and channels allowing water to circulate through them, consisting of jellylike mesohyl sandwiched between two thin layers of cells. Sponges have unspecialized cells that can transform into other types and which often migrate between the main cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems. |
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