In fact, there are a number of creatures with life spans that make the oldest living human seem like a spring chicken in comparison. Here's our list of the 10 animals with the longest life spans  and there's even an immortal animal. First on the list are these large saltwater clams that are native to the Puget Sound and have been known to live for at least 160 years.
medical Definition of angiosperm : any of a class (Angiospermae) of vascular plants (as orchids or roses) that have the seeds in a closed ovary and include the monocotyledons and dicotyledons â compare gymnosperm
Angiosperms, also called flowering plants, have seeds that are enclosed within an ovary (usually a fruit), while gymnosperms have no flowers or fruits, and have unenclosed or ânakedâ seeds on the surface of scales or leaves.Gymnosperm seeds are often configured as cones.iffen âº Science âº Biology âº Botany. Angiosperms, also called flowering plants, have seeds that are enclosed within an ovary (usually a fruit), while gymnosperms have no flowers or fruits, and have unenclosed or ânakedâ seeds on the surface of scales or leaves. Gymnosperm seeds are often configured as cones.