Abstract
Every spring, something seemingly miraculous happens in the woods in certain parts of the world—thousands of leaves burst from buds on bare tree branches, transforming the landscape from the browns and grays of winter to the bright greens of spring and summer. Although this process is most obvious in regions with drastic seasonal changes, seed plants all over the world regularly produce and lose leaves as they grow. How does this happen? Where do these leaves come from? The cells that make up these leaves are produced by a tiny cluster of cells called the shoot apical meristem. The cells in the shoot apical meristem have the potential to develop into various kinds of cells. Through cell division, meristem cells eventually produce all the above-ground parts of a plant, including leaves. In this article, we explain how meristems function and highlight how these tiny clusters of cells impact our day-to-day lives. We will also provide suggestions for observing meristems at work.
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