The difference in the nervous systems of vertebrates and invertebrates is:

Question

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The nervous system of vertebrates is hierarchical, meaning that it is composed of different levels of control, including the brain, spinal cord, and peripheral nerves. In contrast, invertebrates lack this hierarchical structure, although some do have centralized nerve centers. Neither invertebrates nor vertebrates have a larger cerebral cortex, and vertebrates do have a spinal column.

The Difference in the Nervous Systems of Vertebrates and Invertebrates