What is a common characteristic of angiosperms?

Angiosperms, commonly known as flowering plants, typically exhibit a hardwood structure, which is one of their most notable characteristics. Hardwood plants produce broad leaves that are often used to undergo photosynthesis more efficiently than the needle-like leaves found in some other groups of plants, such as conifers. The hardwood structure allows these plants to grow larger and develop complex branching systems, providing stability and support for their foliage and reproductive structures.

In comparison, other options like seed cones, needle-like leaves, and thick bark are more characteristic of gymnosperms and certain other plant types rather than angiosperms. Gymnosperms, for example, often have seed cones, while many coniferous species possess needle-like leaves to reduce water loss in their often arid environments. Although some angiosperms can develop thick bark, it is not a defining trait across the entire group, making hardwood structure a more accurate representation of a common characteristic among angiosperms.