Bacterial Morphology and Metabolism
Bacteria are single-celled microorganisms and the part of microbiological science which comprises the study of bacteria is known as “Bacteriology”. Bacteria display a wide variety of shapes and sizes, called morphologies. Bacterial cells are about one-tenth the size of eukaryotic cells and are typically 0.5–5.0 micrometres in length. The ancestors of present bacteria were said to be first forms of life on earth.