What characteristic do all angiosperms have in common?

In plants, the Spermatophyta is divided into gymnosperms and angiosperms. Angiosperms are the most diverse and the most dominant group of plants. Angiosperms are all flowering plants and are distinguished from gymnosperms just because of their ability to flowers and produce seeds that are enclosed in the fruits. These two characteristics are common in all angiosperms. They have the ability to produce under the vast variety of the habitats and can be in the form of bushes, herbs, shrubs and can also grow as the trees. They have a unique and distinctive underground root and an aerial shoot system. Their roots are very complex