What type of plants have seeds enclosed within a closed ovary?

Angiosperms are defined as flowering plants that produce seeds enclosed within a closed ovary. This characteristic is fundamental to their classification and sets them apart from other plant groups. The ovary develops into a fruit after fertilization, which protects the seeds and aids in their dispersal. This unique feature allows angiosperms to have various adaptations that enhance their survival and reproduction in a wide range of environments.

In contrast, gymnosperms, such as conifers, produce seeds that are not enclosed in an ovary but are instead exposed on the surface of cones. This fundamental difference highlights the distinct reproductive strategies between these two groups of plants. While dicots are a subgroup of angiosperms, they do not represent the entire category, and thus the definition of angiosperms comprehensively includes all plants with seeds enclosed in ovaries.