Explain the comparison between endocrine and nervous system

Q1. An efficient DNA probe can sometimes be developed by knowing the amino acid sequence of the protein encoded by the gene. A student argued that this is too time-consuming as the complete amino acid sequence must be determined in order to create the probe. Does the student have a valid argument? Why or why not give details?
Q2. Both endocrine and nervous system are major regulating system of the body; but nervous system has been compared to an airmail delivery system and the endocrine to pony express. Briefly explain the comparison.

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