What is an angiosperm and a gymnosperm?

The difference between an AngiOSperm and a Gymnosperm is that AngiOSperms are flowering plants while Gymnosperms are not. A. include plants that use flowers to reproduce. More information on this topic can be researched online or in a Biology book. I strongly recommend Dale Layman's Biology Demystified for more info. An angiOSperm also forms seeds inside a protective chamber called an ovary and a gymnosperm bears naked seeds (no ovary).