A biofilm is any group of microorganisms in which cells stick to each other and often also to a surface. These adherent cells become embedded within a slimy extracellular matrix that is composed of extracellular polymeric substances (EPS).
Career Requirements. Kindergarten teachers in public schools are required to have at least a bachelor's degree in education and teacher certification for the state in which they work. Certification typically requires candidates to complete student teaching requirements and pass any required professional exams.
Teachers at the postsecondary level are usually required to have a master's degree or higher. While the same is not required in order to teach K-12, prospective public school teachers must have a bachelor's degree from an approved teacher education program to become licensed. Educational Requirements for Teachers.