Which of the following groups of animals do not possess a nervous system?
BIOLOGY
WAEC 2017
Which of the following groups of animals do not possess a nervous system?
- A. Porifera
- B. Cnidaria
- C. Platyheminthes
- D. Nematoda
Correct Answer: A. Porifera
Explanation
Porifera are 'pore bearing' organisms, commonly known as sponges, are the only multicellular organisms without a nervous system. Their response to stimuli is by a contraction in their bodies.
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