There are different groups of bacteria belonging...

Bacteria (single: bacterium) are unicellular organisms that can only be seen through a microscope. They come in different shapes and sizes, and their size measured in microns - that millionth of a meter. There are several different types of bacteria in the world, and they are everywhere and in all conditions. There are different groups of bacteria belonging to the same family and have evolved from one bacterium (ancestors). However, each of these types have their specific characteristics - which evolved after the separation from the original form. Before the invention of DNA sequencing technique, bacteria are mainly classified based on their form - also known as morphology, biochemistry and painting - I. BC as gram-positive or Gram-negative staining. Currently, in addition to morphology, DNA sequencing is also used for classification of bacteria. DNA sequencing helps in understanding the relationship between the two types of bacteria i. ie if they are connected to each other despite their different forms. Along with the DNA sequence, form and other things such as their metabolic activity, the conditions necessary for their growth, biochemical reactions (eg, biochemistry, as mentioned above), antigenic properties and other characteristics are also useful in classifying bacteria. Based on morphology, DNA sequencing, the necessary conditions and biochemistry, scientists came to these >> << classification of 28 different bacterial fil Each type further corresponds to the number of species and genera of bacteria. In broad terms, this bacterial classification includes bacteria that are in different types of environment, such as sweet water bacteria, ocean water bacteria, bacteria that can survive extreme temperatures (extreme hot as the water sources of sulfur bacteria and cold as in bacteria in Antarctic ice), bacteria that can survive in very acidic medium, the bacteria that can survive in a highly alkaline medium, the bacteria that can withstand high energy, aerobic bacteria, anaerobic bacteria, autotrophic bacteria, heterotrophic bacteria and so on ... Although bacteria are generally classified by type i. e scientific classification of organisms can be divided into the following groups for simplification. Bacterial classification based form as already mentioned, the appearance of DNA sequencing, bacteria were classified according to their shape and biochemical properties. Most bacteria belong to three main forms:

bacilliform bacteria called bacilli - eg E. Coli and Salmonella

spherical bacteria called kokamy - eg staphylococci and streptococci

Spiral bacteria are called spirilla - eg Treponema and Borellia

Some bacteria belonging to the different forms that are more complex than the forms mentioned above. Bacterial classification based on the methods of staining bacteria are grouped as "Gram" and "gram-negative" bacteria, based on the results of Gram staining method, in which the agent is used for binding to bacterial cell wall. Gram-positive bacteria - to make crystal violet dye and retain its blue or purple. Gram-negative bacteria - are not crystal violet dye, and therefore appears red or pink. Aerobic and anaerobic bacteria Bacteria are also classified based on the requirement of oxygen for their survival. Aerobic bacteria - Bacteria that require oxygen for their survival. Anaerobic bacteria - bacteria that require oxygen for survival. Anaerobic bacteria can not carry oxygen and can die, if the oxygen environment. These types of bacteria commonly found in places such as beneath the surface of the Earth, deep oceans, and bacteria that live in certain environments. Autotrophic and heterotrophic bacteria is one of the most important types of classification, as it considers the most important aspect of bacterial growth and reproduction. Autotrophic bacteria (also known as autotrophs) to obtain carbon dioxide requires. Heterotrophic bacteria get sugar from among them (such as living cells or organisms, they are in). Some autotrophs directly use sunlight to produce sugar from carbon dioxide, while others depend on various chemical reactions. Bacterial classification based on the environment As we mentioned earlier, the bacteria are found in all types of environments. While cheap strattera some types of bacteria can withstand extreme conditions, others require specific conditions of moderate to survive. Based on the environmental conditions of their stay, bacteria are divided into:

mezofilov - requiring reasonable conditions to survive. Neutrophils - requiring reasonable conditions to survive. Extremophiles - which can survive in extreme conditions. Atsydofily - who can tolerate a low pH. Alkaliphiles - which can withstand high pH conditions. Termofily - which can withstand high temperatures. Psychrophilic bacteria - which can survive very cold conditions. Halofyly - which can survive in highly saline conditions. Osmophiles, - which can survive in high blood sugar osmotic conditions. Great diversity that you can see in bacterial species makes it almost impossible to think of classification, which will include each of the planet. Add to this the fact that these bacteria are also constantly evolving and adapting to survive the environment in which living was considered impossible (the best example is the bacteria that live in brine lakes in the Mediterranean Sea where the salinity is much greater than salinity of normal seawater.) and the task becomes more difficult. .