Prokaryotic Cells
Living things are made up of distinct units called cells. Multicellular animals including humans are made up of complex cells with multiple internal organelles. These cells are called eukaryotic cells. Single-celled organisms like bacteria are examples of prokaryotic cells, Bacteria have many shapes two group bacillus (e.g. Streptobacillus and curverod ) and cocus (e.g. Micrococcus, Diplococcus, Streptococcus and Staphylococcus). There are other prokaryotic cells which exhibit enough differences from bacteria to be classified as a separate Domain Archaea or the Archaebacteria four group halophilic archaea, thermophilic archaea, methanogenic archaea and acidophilic archaea