What is the best description of eubacteria?
A group of single-celled organisms that are similar to bacteria in size and simplicity of structure but radically different in molecular organization
A group of single-celled or multicellular organisms with cells that contain a nucleus as well as membrane-bound organelles
A group of single-celled organisms, often with rigid cell walls and flagella for movement
A kingdom of living things that have cells with a nucleus, have cell walls that contain chitin, and are heterotrophs