AP BIOLOGY

Detailed explanation-1: -The stored food in tubers is used to grow stems. Therefore, the potato is an underground stem because it possesses axillary buds called eyes. They are underground stems not because they lack chlorophyll. Also, they do bear roots and contain reserved food.

Detailed explanation-2: -The correct option is A True Potato and ginger are both underground parts that store food.

Detailed explanation-3: -Potato is the modified underground stem for storage of food whereas sweet-potato, turnip and carrot are the modified root for storage of food.

Detailed explanation-4: -Though potato seems to be a root, it is a stem. It is actually a modified stem usually called tuber. As the tubers grow underground, they are connected by small stem sections called stolons. Besides, there are small notches or pits present in potatoes from which new potato buds can grow.

Detailed explanation-5: -The potatoes are considered stems because the potatoes grow on underground stems, called stolons. You can know potato tubers are actually thickened stems because they have buds that sprout stems and leaves. Roots don’t do that.