What are nodes in the context of a plant's structure?

Nodes are critical structural components of a plant's stem, where leaves, branches, or flower buds attach to the stem. They play an essential role in the overall growth and development of the plant, as they are the points from which new shoots and leaves can emerge. The presence of nodes allows for the lateral growth of branches, maximizing the plant's ability to capture sunlight and conduct photosynthesis.

In contrast, the segments between nodes, known as internodes, serve as the space that separates them. The roots, although vital for nutrient and water uptake, are a separate part of the plant structure and do not pertain to the concept of nodes. Similarly, while parts of a flower, such as the anther, produce pollen, this aspect is distinct from the function and definition of nodes in the overall architecture of the plant. Understanding nodes is fundamental to recognizing how plants expand and produce new growth.