Download article as a PDF. Civil rights are the rights of individuals to receive equal treatment (and to be free from unfair treatment or discrimination) in a number of settings -- including education, employment, housing, and more -- and based on certain legally-protected characteristics.ownload article as a PDF. Civil rights are the rights of individuals to receive equal treatment (and to be free from unfair treatment or discrimination) in a number of settings -- including education, employment, housing, and more -- and based on certain legally-protected characteristics.
Cell wall. Definition. noun, plural: cell walls. A membrane of the cell that forms external to the cell membrane whose main role is to give cells rigidity, strength and protection against mechanical stress. It is found in cells of plants, bacteria, archaea, fungi, and algae. Animals and most protists do not have cell walls. Supplement.
Supplement. When the cell stops from expanding, a secondary wall is deposited between the primary cell wall and plasma membrane that renders support, strength and protection. The secondary cell wall consists mainly of cellulose, but also other polysaccharides, lignin and proteins. In some cells, such as found in xylem, the secondary cell wall contains lignin, which strengthens and waterproofs the wall. Other plant cells have secondary cell wall with additional function, such as food storage.