AP BIOLOGY

Detailed explanation-1: –Onion and garlic are also examples of underground stems that are bulbs. The bulb is formed by the overlapping of many nodes in the condensed stem.

Detailed explanation-2: -Vegetative propagation is a type of asexual reproduction in which new plants are produced from vegetative parts of plants like roots, stems, leaves, and buds. Underground stems of onion, tulip, and lily are called bulbs. These bulbs have axillary buds protected by fleshy scale leaves.

Detailed explanation-3: -Examples of underground stems include corms, such as taro (left); rhizomes, such as ginger (center); and tubers, such as potatoes (right).

Detailed explanation-4: -The underground stems are modified plants that perform a variety of functions. Rhizomes, tubers, maize, and bulbs are examples of underground stems. Only some sections of underground stems are edible; the entire stem is not edible. Onion and garlic are two other examples.