Sedimentary Rock Examples. Common clastic sedimentary rocks are listed on the table below. They are listed by grain size in decending order. Grain size is one factor in classifying sedimentary rocks .Clicking on the name of the rock will bring up a larger picture and a description of the rock type in a new window.
THE PROKARYOTIC CELL: BACTERIA. 1. There are three basic shapes of bacteria: coccus, bacillus, and spiral. 2. Based on planes of division, the coccus shape can appear in several distinct arrangements: diplococcus, streptococcus, tetrad, sarcina, and staphylococcus.acterial cell shape is determined primarily by a protein called MreB. MreB forms a spiral band â a simple cytoskeleton â around the interior of the cell just under the cytoplasmic membrane. It is thought to define shape by recruiting additional proteins that then direct the specific pattern of bacterial cell growth.
Most people know that germs are very small. The term microbe, short for micro-organism, is a blanket term for small organisms that are only visible under a powerful microscope. Bacteria, viruses, fungi, and parasites are all considered microbes.iruses cause viral infections, in which the virus attaches itself to the cells in your body and causes them to behave differently, often in very harmful ways. Unlike bacterial infections, viral infections are very difficult to treat with medication.