How is a spore different from a seed? which organs reproduce by spores?

Spore plants reproduce by spores – these are mosses, lyes, horsetails and ferns. And gymnosperms and flowering plants reproduce by seeds. A spore is one cell, and a seminal organ is a multicellular organ. Inside the seed there is a plant embryo, a supply of nutrients, and outside it is covered with a dense seed coat. All this is not in dispute. Therefore, the dispute, having fallen into unfavorable conditions, dies. A seed can withstand such conditions for a long time, but will quickly form a sprout if conditions change.