Question

Q.1. Nerves connecting two cerebral ganglia and those connecting cerebral and pedal ganglia are respectively called : (a) Cerebral connective and cerebro-pedal commissure (b) Cerebral commissure and cerebro-pedal commissure (c) Cerebral connective and cerebro-pedal connective
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Answer 1

Answer:

The diffuse nervous system is the most primitive nervous system. In diffuse systems nerve cells are distributed throughout the organism, usually beneath the outer epidermal layer.