Which among the following lacks the nervous system?
Correct answer: D. Sponge
- A. Flatworms
- B. Annelida
- C. Cnidaria
- D. Sponge
Explanation
Sponges are the most basic form of a multicellular animal. They lack the nerves and digestive systems seen in other animals, relying on water flowing through their canal system for their food and oxygen.
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