What type of leaf arrangement occurs when only a single leaf is attached at each node?

The type of leaf arrangement where only a single leaf is attached at each node is known as an alternate arrangement. In this system, leaves are positioned one at a time along the stem, alternating from one side to the other. This helps to maximize light exposure for each leaf, allowing for effective photosynthesis.

In contrast, opposite leaf arrangements feature pairs of leaves that emerge directly across from each other at each node, while whorled arrangements involve multiple leaves coming from a single node, encircling the stem. Compound leaves consist of multiple leaflets attached to a single petiole, which is different from the structure of a singular leaf per node. Understanding these distinctions is crucial for identifying and classifying various plant types in horticulture.