What is the cell wall of algae made of?

The cell wall of algae is primarily made of cellulose. Cellulose is a complex carbohydrate that provides structural support and protection to the cells of algae. This polysaccharide forms the main framework of the cell wall, giving it strength and rigidity. Some algae also have additional components in their cell walls such as hemicellulose, pectin, and sometimes calcium carbonate or silica, depending on the species. The cell wall helps maintain the shape of the algal cells and protects them from environmental stresses. By providing support, the cell wall allows algae to grow in various aquatic environments, including both freshwater and marine habitats.