When potatoes are in the ground, do they swell with water when it rains? if not, how do you explain that, and if so, what would be the advantage or disadvantage?

When potatoes are in ground, they do not swell with water when it rains. The potato is already filled with water. The potato cannot gather the minerals directly. It is the roots that absorb the nutrients and send it to the potato. The rain water has little effect on the potato. I hope the answer has helped you. 

a) scientist have updated tarxharchaea is the closest related to eukarya