Final answer:
Cocci are a type of bacteria that are usually spherical and can have unique arrangements like clusters or chains. They possess cell walls, cell membranes, and internal structures for genetic material.
Step-by-step explanation:
Bacteria are microorganisms with various shapes, among which cocci are typically spherical or sometimes kidney-shaped. Cocci have cell walls, cell membranes, ribosomes, and a nucleoid region containing genetic material. They may form specific arrangements like chains (streptococci) or clusters (staphylococci), and their shape can influence their dispersion and function, such as in seeds or spores.