Which aspect of the angiosperm life cycle and morphology, depicted above, is not unique to angiosperms?

The aspect that is not unique to angiosperms is the gymnosperms. Both gymnosperm and angiosperms are heterosporous, they produce a supermatophytes or also called as seed producing plant. As known, there are almost one thousand species of gymonisperm, they are usually found in the surface or the leaves of the plants.