From one, come manyNature has had billions of years to perfect it's strategy for survival. Plants especially are capable of fascinating reproduction. For example by clipping the leaf from a Snake plant, such as the one pictured below, cutting it into three pieces and planting it in soil, a new plant will emerge in 12 weeks.
Spider plants and Mt Hood variety strawberries have a different strategy. They send out shoots of baby plants that have the ability to either cling to the mother plant and function as a part of the whole or they can be rooted themselves as entirely new plants! I have spider plant babies and would be happy to share a few with anyone who is interested.
Propagating plants is a wonderful way to give presents and promote sustainability. Check out this article on how houseplants actually keep you healthier! House Plants Keep You Healthy!