Angiosperms are seed-producing flowering plants whose seeds are enclosed within an ovary, while gymnosperms are seed-producing non-flowering plants whose seeds are unenclosed. Angiosperms have seasonal life cycles, produce seeds inside fruits, and reproduce sexually through flowers. In contrast, gymnosperms are evergreen, produce bare seeds on scales, leaves, or cones, and reproduce through unisexual cones. While both are seed-producing plants, angiosperms and gymnosperms differ in their reproductive structures, seed and pollen distribution, and wood properties.