The first main type of nervous system is a:
Correct answer: D. Diffused nervous system
- A. Autonomic nervous system
- B. Centralized nervous system
- C. Peripheral nervous system
- D. Diffused nervous system
Explanation
In basic evolutionary classifications, a diffuse nervous system is regarded as the earliest and simplest type, as seen in animals such as Hydra. Centralized systems developed later with a concentration of neurons in a central region.
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