Nervous System
Neuron
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1: (d) All of these, 2: (c) Both a and b, 3: (a) Somatic and autonomic nervous systems, 4: (d) Sympathetic and parasympathetic nervous systems, 5: (b) Cyton, 6: (c) Axon, 7: (d) 2 or more, 8: (a) 1, 9: (b) Retina, 10: (d) Embryonic stage