How do you classify bacteria. How do you classify bacteria in the Kingdom? 2022-10-27
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Bacteria are a diverse group of microorganisms that are found in virtually every habitat on earth. They are an ancient group of organisms, with a fossil record dating back more than 3.5 billion years. Bacteria are classified based on a variety of characteristics, including their shape, size, and metabolic capabilities. In this essay, we will explore the various ways in which bacteria are classified and how these classifications are used to understand the biology and behavior of these important microorganisms.
One way in which bacteria are classified is based on their shape. There are three main categories of bacterial shape: cocci (spherical), bacilli (rod-shaped), and spirilli (spiral-shaped). Cocci are the most common type of bacterial cell, and they can be found in a variety of shapes, including round, oval, or spherical. Bacilli are long, rod-shaped cells, and they can be either straight or curved. Spirilli are spiral-shaped cells that may be either tightly coiled or more loosely coiled.
Another way in which bacteria are classified is based on their size. Bacteria are typically small, with most species ranging in size from 0.2 to 2.0 micrometers in diameter. However, there is considerable variation in size among different species of bacteria. Some species are much larger than others, and some are so small that they can only be seen with the aid of a microscope.
Bacteria are also classified based on their metabolic capabilities. Some bacteria are autotrophs, which means that they are able to produce their own food using energy from sources such as sunlight or chemical reactions. Other bacteria are heterotrophs, which means that they must obtain their energy from other sources, such as organic matter. Heterotrophic bacteria can be further classified based on the types of organic matter that they can utilize. For example, some bacteria can only utilize specific types of sugars or amino acids, while others are more generalists and can utilize a wide variety of organic compounds.
Finally, bacteria are also classified based on their ability to grow and survive in different environments. Some bacteria are highly adaptable and can grow in a wide range of conditions, while others are more specialized and can only survive in certain types of environments. For example, some bacteria are able to grow at very high or very low temperatures, while others can only grow in neutral pH environments.
In conclusion, bacteria are classified based on their shape, size, metabolic capabilities, and ability to grow and survive in different environments. These classifications are important because they help scientists to understand the biology and behavior of these microorganisms, and they can also be used to identify and classify new species of bacteria.
4 Ways to Identify Bacteria
Gram Stain th century, Hans Christian Joachim Gram used a combination of two dyes, crystal violet and safranin, to classify bacteria based on the cell wall structural properties. There are about 30,000 formally named species that are in pure culture and for which the physiology has been investigated. The bacterias are classified broadly on the basis of staining called the gram stain. Psychrotrops facultative psychrophiles : Even at 0°C, certain bacteria may thrive, although 20—30°C is the ideal temperature for growth. What are 6 structures of a bacterial cell? Facultative anaerobes: These also survive in environments without oxygen, but when exposed to oxygen they can survive.
Other surface descriptions might be: dull opposite of glistening , veined, rough, wrinkled or shriveled , glistening. Microorganisms are classified into three primary groups on the basis of their preferred range of temperature: psychrophiles cold-loving microbes , mesophiles moderate-temperature loving microbes and thermophiles heat-loving microbes. Plant are multicellular organisms that typically produce their own food from inorganic matter by the process of photosynthesis and that have more or less rigid cell walls containing cellulose. What are the 3 common shapes of bacteria? Classification of Bacteria on the Basis of Temperature Requirement According to how they react to temperature, bacteria may be divided into the primary categories listed below. Legionella, Haemophilus, and some other pathogens require specific growth factors, whereas E.
Bacteria are identified routinely by morphological and biochemical tests, supplemented as needed by specialized tests such as serotyping and antibiotic inhibition patterns. This image is not licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Here, identification is made based on the patterns of fatty acid esters. Gently rinse with water for no more than 5 seconds to remove the alcohol or acetone. For instance, Bacillus cereus C Vibro:The Vibro are a single genus of bacteria that have a curved, comma-shaped form. For example, one diarrheal disease agent, Campylobacter jejuni, grows well at 42° C in the presence of several antibiotics; another, Y. Cocci bacteria may exist as single cells or remain attached to each other.
Safranin is a red dye, which will act as a counterstain to the crystal violet and dye any bacteria that did not hold the violet stain. The three main shapes of bacteria are coccus, spiral, and bacillus. This image may not be used by other entities without the express written consent of wikiHow, Inc. Bacteria that stain red during the Gram test are classified as Gram-negative. Therefore, identifying the spores using staining with malachite green and safranin dyes is another useful tool.
Microaerophilic: grow best at very low levels of oxygen. Put your disposable gloves and any other contaminated waste materials in a biohazard bag when you are done. Newer molecular techniques permit species to be identified by their genetic sequences, sometimes directly from the clinical specimen. The resultant metabolic profile is compared with the appropriate Biolog database, containing the biochemical fingerprints of hundreds of Gram-positive and Gram-negative species. Not all bacteria require oxygen to survive. Bacteria which derive energy from sunlight are called phototrophs. Streptococcus: In this organism, cells continually divide along the same axis to produce chains of cells.
Classification of Bacteria by Shapes & Characteristics
These bacteria are unicellular single-celled organisms and are of microscopic and invisible to the naked eye. It works on the process of elimination. Bacteria are classified and identified to distinguish one organism from another and to group similar organisms by criteria of interest to microbiologists or other scientists. How do you identify bacteria under a microscope? What are the classifications of bacteria? Aspects like size, separation from other colonies, circularity vs. Bacterial species such as Staphylococci, Salmonella, and E.
How did my plant get thrips? This classification is done on the basis of shape, cell wall, flagella, nutrition and morphology. Those that obtain energy from chemical reactions are called chemotrophs. Spore production in Gram-positive rods such as Clostridium is an important survival feature. Hence, they have not arrived at systems of classification in which the natural relations of the microorganisms are used as a basis. In this, bacterial rods stain red while the spores stain green.
Perhaps the most straightforward characteristic of bacteria is their existence as single-celled organisms. Hence now, Bacteria are classified according to their specific shape. Unlike cocci and bacilli bacteria, some types of bacteria appear curved when viewed under the microscope. Is a rod like bacteria? You will also be using heat sources, such as a Bunsen burner, spirit lamp, or electric slide heater. In prokaryotes, the membrane structure of archaea is very similar to Gram-positive bacteria, mainly because both have a lipid bilayer. Salmonella enterica subsp, Bacillus cereus, and Salmonella choleraesuis , others are attached.