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Question

The nervous system develop from which of the following primary germ layer?

A
Endoderm
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B
Mesoderm
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C
Ectoderm
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D
Enteroderm
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E
Epidermis
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Solution

The correct option is D Ectoderm
Neural crest cells of ectoderm migrate downward to form the dorsal root ganglia of the spinal nerves and the postganglionic sympathetic neurons. The sensory cells in the dorsal root ganglia give rise to dendrites extending to sense organs and axons extending into the spinal cord. Some other neural crest cells form parts of certain sense organs and parts of the head. Few head derivatives of the neural crest give rise to sensory nerves and other parts of the peripheral nervous system and ganglia of the autonomic nervous system. Thus, the correct answer is option C.

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