The evolution of animal nervous systems reflects changes in body symmetry. Radially
Chapter 28, Problem 28.10(choose chapter or problem)
The evolution of animal nervous systems reflects changes in body symmetry. Radially symmetric animals have a nervous system arranged in a weblike system of neurons called a nerve net. Among bilaterally symmetric animals, nervous systems evolved to exhibit cephalization, the concentration of the nervous system in the head end, and centralization, the presence of a central nervous system.
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