Which characteristic is common among the Solanaceae family of plants?

The Solanaceae family, commonly known as the nightshade family, is characterized by flowers that typically have five petals and five stamens. This floral structure is a notable trait among many members of the family, which includes economically important plants such as tomatoes, potatoes, and eggplants. The arrangement of five petals and stamens plays a significant role in the family’s reproductive process, as it facilitates pollination.

While the other options might apply to certain plants, they do not represent a defining feature of the entire Solanaceae family. For instance, some plants in the family exhibit hollow stems, but this is not a universal characteristic. Similarly, not all Solanaceae plants have fuzzy leaves or a vining nature; many species are herbaceous or shrub-like in growth form. Thus, the characteristic of five petals and five stamens is a reliable way to identify members of the Solanaceae family.