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 vs Gymnosperms. The angiosperms and the gymnosperms are part of the kingdom of plants. The former is generally considered as flowering plants while the gymnosperms are those that are known as the ancestors of such plants. Scientifically, the seed bearing plants are divided into the angiosperms and gymnosperms. One major difference that often defines these plants is the seeds that it contains. The angiosperm seeds are those that are concealed within the fruit.