is bacteria a microorganism
Bacteria (one of them is a bacterium) are very small organisms. They are prokaryotic microorganisms. Bacterial cells do not have a nucleus, and most have no organelles with membranes round them.Most have a cell wall. They do have DNA, and their biochemistry is basically the same as other living things.hey are prokaryotic microorganisms. Bacterial cells do not have a nucleus, and most have no organelles with membranes round them. Most have a cell wall. They do have DNA, and their biochemistry is basically the same as other living things.
A microorganism or microbe is an organism which is microscopic, making it too small to be seen by the unaided human eye. The study of microorganisms is called microbiology. Microorganisms include bacteria, fungi, archaea, protists and viruses. The first of these four types of microorganisms may either be free-living or parasitic.