Answer:
making seeds
Explanation:
The plant that bear flower at least once during its life cycle, it is said to be a flowering plant. Bearing flower is an essential part of the process of reproduction of a flowering plant.
The plant that never bear a flower in its life cycle but still is able to produce the seeds, is said to be a non-flowering plant.
The fact common in both the flowering and non flowering plants is that both of them produce seeds.
They are known as mysteries. There really wasn't much to go on even after looking for a while But i hope this helps