Yeast, a cellular model. Yeast is a simple living being that functions in practically the same way as human cells. It is an historical subject of fundamental research to understand cellular and genetic phenomena. It is a representative model of all eukaryotic cells.
Covenant. An agreement, contract, or written promise between two individuals that frequently constitutes a pledge to do or refrain from doing something. The individual making the promise or agreement is known as the covenantor, and the individual to whom such promise is made is called the covenantee.
A restrictive covenant is a private written agreement between landowners to restrict the use or development of land for the benefit of other land. The land where the restrictions apply is called the ' burdened ' land. The land that benefits from the restrictions on the burdened land is called the ' benefited ' land. covenant that limits the use and development of a lot to a single house is a common type of restrictive covenant. Covenants that restrict the type of building materials that can be used for new buildings and fences are also common.