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Q.
Which of the following animal has a network of neurons but does not comprise the brain?
NTA AbhyasNTA Abhyas 2022
Solution:
The neural organisation is very simple in lower invertebrates. For example, in Hydra, it is composed of a network of neurons. The neural system is better organised in insects, where a brain is present along with a number of ganglia and neural tissues. The vertebrates have a more developed neural system.