A) platyhelminthes
B) cnidarian
C) annelids
D) sponges
Correct Answer: B
Solution :
Nevous system is absent from sponges. In coelenterates, it is diffuse type (\[i.e.,\]nerve fibres not differentiated into dendrons and axon). Nervous system is called true when it occurs as paired cords.You need to login to perform this action.
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