Bacteria reproduction
Bacteria are microscopic singular celled organisms grouped in the prokaryote kingdom. They have a seemingly simple internal structure but that is not so the internal structure of a bacterium is quite complicated . Bacterial growth is generally studied in cell cultures by "visible count" estimation which shows an apparent growth curve. (Stephenson 50) The growth curve shows the stages of bacterial growth within a cell culture. (Thimann 623). Bacteria can survive in a number of different extreme environments from extreme heat to little water. Bacterium have a internal structure that is more complicated than it seems at first. The first part of the bacterium is the plasma membrane which is a selectively permeable barrier that is the boundary of the cell. (Prescott 40) The next portion of a bacterium is the cytoplasmic matrix. The cytoplasmic matrix is the substance lying between the plasma membrane and the nucleoid. (Prescott 45) Although it is generally featureless in a microscopes it can be packed with ribosomes and is generally highly organized. (Prescott 45) The next one is the nucleiod of a bacterium.(Prescott 40) This is the area within a bacterium in which the genetic material of the cell is located. (Prescott 49) The n
(Edwards 178) All of these different types of bacteria show how they have evolved so that they can live almost every where. (Prescott 47) The inclusion bodies within a bacterial cell are storage for different substances such as carbon, phosphate and other substances. (Stephenson 50) The fourth phase is one of decreasing cell growth with many cells dying off. Conditions in which bacteria can not live are getting harder and harder to find. ucleiod itself is not defined by a membrane but is an irregularly shaped region of the cell. (Edwards 117) Halotolerant and halophilic bacteria are bacteria that can survive with little salt or lots of salt. The thermopile bacteria are bacteria that can survive at temperatures of forty-two to one hundred degrees Celsius or more. (Thimann 623) The reason for the lag phase is this when you first put bacteria in a culture they need time to get into a state of growth called the embryonic stage. The eighth and final phase of the growth curve is one of decreasing death rate. (Edwards 147) These bacteria are commonly found in salt and soda lakes such as the Great Salt Lake in Utah, the Dead Sea and the soda lakes of the Great Rift Valley in Kenya. (Prescott 50) The gas vacuole of a bacterium is used for buoyancy in aquatic environments. (Edwards 34) Their environments are highly acidic soils in mining and geothermal areas. One type of classification for bacteria is based on the temperature at which a bacterium can survive. (Stephenson 50) During logarithmic growth stage the rate of increase remains constant and the cell size returns to normal.
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