Here's why:

* Gymnosperms are seed-bearing plants that do not produce flowers or fruits. Their seeds are typically exposed on the surface of cones or specialized structures. Examples include conifers (pines, firs), cycads, and ginkgoes.

* Angiosperms, also known as flowering plants, are the most diverse group of plants. They produce flowers, which contain the reproductive organs, and their seeds are enclosed within fruits. Examples include trees, shrubs, grasses, and wildflowers.

Here's a simple analogy:

Think of gymnosperms as "naked seed" plants, while angiosperms are "covered seed" plants.