Why do potatoes have wart like surface?

Potatoes don't actually have warts! The bumpy surface you see on potatoes is called lenticels.

Here's what they are and why they're important:

* Lenticels are small, raised pores found on the surface of potato tubers (and other plants, like tree bark).

* They are essential for gas exchange. They allow oxygen to enter the potato and carbon dioxide to escape, which is crucial for respiration (how the potato gets energy).

* They also help regulate moisture. Lenticels can open and close to control water loss.

So, those bumps aren't warts, they're vital for the potato's survival!