Answers

2016-04-03T07:54:23+05:30
It has nodes and internodes
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2016-04-03T10:06:05+05:30
Tuber : It is a modified stem of the plant. 

Potato is considered as a stem because it is having the nodes and inter nodes and even buds. these three characteristic of the potato has made it a stem instead of a tuber.  
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