Potato is a stem and a sweet potato is a root. Justify the statement on the basis of external features.
The stem of the potato has been modified to store food, and these modifications are known as stolon. The ends of the stolon swell to form tubers which is a swollen stem. Potato tubers have buds that sprout stems and leaves from them, whereas potato roots lack these characteristics. It has nodes (eyes) that are made up of one or more buds that are covered by a leaf scar. During sprouting, adventitious roots appear as well. On the other hand, sweet potato is a swollen adventitious root or tuberous root. It does not possess nodes, internodes and buds like a stem.
