Agriculture Weed Control (Category 103) Practice Exam

Underground stems that store nutrients are rhizomes. They run horizontally below the soil surface and hold reserve carbohydrates, which helps the plant survive adverse conditions and regrow after damage. New shoots can sprout from nodes along the rhizome, enabling vegetative propagation. For example, ginger and iris have rhizomes that store energy for the plant.

A rosette describes a cluster of leaves at the ground level, not a stem that stores nutrients. Stolons are above-ground runners that spread and root to form new plants, not underground stems. Surfacant isn’t a plant structure at all.