What is the differences between seedless and seed plant?

Answer 1

One had seeds (seed) and the other doesn't (seedless). When something ends with '-less', it means it doesn't have any.

Answer 2

Seedless plants reproduce through spores, while seed plants reproduce through seeds. Seed plants have a more complex reproductive system that includes flowers and fruits, while seedless plants do not produce flowers or fruits. Seedless plants, such as ferns, mosses, and algae, are typically smaller and simpler in structure compared to seed plants, which include angiosperms (flowering plants) and gymnosperms (conifers).