Answer:
I'm a starchy plant tuber that is one of the most important food crops, cooked and eaten fried, such as french fries.
A gentleman whose offspring have successfully produced offspring of their own.
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
We are two brothers on opposite sides of the road, but we never see each other. Who are we?
Tear one off and scratch my head, what once was red is black instead!
you hold my tail while I fish for you