Answer:
They evolved after the seedless vascular plants.
Explanation:
Seedless vascular plants have no seeds and they reproduce through spores. E.g Ferns.
Gymnosperms are vascular plants with seeds that are naked. E.g.conifers, cycads
Due to evolutionary changes , the gymnosperms evolved from seedless vascular plants. The angiosperms was also believed to evolve from the gymnosperms. This is how some form
of complexity was achieved.
