The apical bud is the growing tip of a plant, located at the top of the stem or branch. This bud is crucial for the plant's growth because it produces new leaves and stems. The apical bud contains cells that divide and differentiate, allowing the plant to reach for sunlight and expand its structure. When the apical bud is active, it can inhibit the growth of other buds lower on the stem, a phenomenon known as apical dominance. This helps the plant focus its energy on growing taller rather than spreading out. Understanding the role of the apical bud is essential for studying plant development and horticulture.