👉 Pleustons are small, round structures that are found in certain types of fungi and bacteria. They are composed of a specialized cell wall made up of cellulose, which is a polymer of glucose molecules attached to a fatty acid backbone. Pleustons are important for the survival and growth of these organisms and play an essential role in their metabolism. Pleustons can be found in a variety of environments, including soil, air, and water. They are often associated with certain types of