AP BIOLOGY

Detailed explanation-1: -Corms are short upright underground stems surrounded by a few thin scale leaves (as in Crocus and Gladiolus). Bulbs have a greatly reduced stem with thick fleshy scale leaves surrounding it (as in the onion).

Detailed explanation-2: -The onion isn’t a root or a stem. It’s a tunicate bulb with a clump of fleshy leaves on top. An onion is a type of underground stem structure that has been modified. The bulged leaf structure at the base of the onion plant stores its processed food.

Detailed explanation-3: -Roots, rhizomes, bulbs, and tubers Rhizomes are underground stems which grow beneath the surface of soil; they are frequently fleshy and serve as organs of food storage. Sometimes the rhizomes are condensed into solid swollen forms which are then known as corms.

Detailed explanation-4: -Generally in the plants, the stem is used to store food but in plants like onion and garlic leaves are modified into small fleshy scales that are used to store food.

Detailed explanation-5: -Bulb: The modified stem of onion is Bulb. It is a very short disc-shaped underground stem. It bears fleshy scale leaves that store food.