Answer:
fruits and cones
Step-by-step explanation:
Higher plants are classified into two major groups namely: Angiosperm and Gymnosperm. These two groups of higher plants are vascular plants i.e. possess vascular tissues, that propagate by seeds.
The major difference between angiosperms and gymnosperms is that angiosperms bear that seeds in an enclosed structure called FRUITS, which develop from the ovary of a flower. Hence, they are called FLOWERING PLANTS. Gymnosperms, on the other hand, bear their seeds on naked structures called CONES.
Therefore, FRUITS AND CONES are the most useful structures from differentiating angiosperms from gymnosperms.