Bacteria

by Marcos Rojas

Images of bacteria

characteristics of bacteria

  • Bacteria vary from species to species, thus assigning many common traits to bacteria is difficult. Bacterial species are typified by their diversity.
  • There are three notable common traits of bacteria, 1) lack of membrane-bound organelles , 2) unicellular and 3) small (usually microscopic) size.
  • Not all prokaryotes are bacteria, some are which although they share common physicals features to bacteria, are ancestrally different from bacteria
  • shapes of bacteria

    there are a lot of different shapes but There are three basic shapes of bacteria and they are coccus, bacillus, and spiral.

    cell walls of bacteria

    The bacterial cell wall has to be strong to prevent cell lysis but also porous to allow transport across the cell membrane. In this lesson, we will examine the structure of the bacterial cell wall and how it accomplishes both of these crucial tasks.

    movement of bacteria

    The third mechanism is gliding motility. Gliding motility is the movement of cells over surfaces without the aid of flagella, a trait common to many bacteria.

    how bacteria obtain energy

    Bacteria obtain energy by either ingesting other organisms and organic compounds or by producing their own food. The bacteria that produce their own food are called autotrophs. Bacteria that must consume other organic molecules for energy are called heterotrophs.

    how bacteria reproduce

    Bacteria reproduce by binary fission. In this process the bacterium, which is a single cell, divides into two identical daughter cells. Binary fission begins when the DNA of the bacterium divides into two (replicates).

    how are bacteria harmful

    bacteria cause great losses to animal and plant life by causing various diseases in them. Cholera, typhoid, pneumonia, dysentery, tuberculosis, tetanus, etc., are more common human diseases. ‘Ring disease of potato’, ‘yellowing rot of wheat,’ ‘Citrus canker,’ ‘wilt of cucumber’ and ‘crown gall’ are the common bacterial diseases of plants.

    how are bacteria helpful

    Though some bacteria cause disease and illness in humans, the majority are harmless. Some bacteria are used to aid digestion, used in preparation of certain foods, used to battle infections or used by industry.

    bacteria that have killed large numbers of people

    In the Middle Ages, the so-called Black Plague (Bubonic plague ) killed millions of people in Europe. The crowded living conditions and poor sanitation that were typical of the disadvantaged populations of the large European cities of that time were breeding grounds for the spread of plague.
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    how to treat bacteria

    To make sure that you get the right treatment, your doctor may take a sample to identify the type of bacteria causing the infection, for example a swab from the throat or a urine sample. Antibiotics do not work for infections caused by other types of micro-organism, such as viruses or fungi.

    8 diseases caused by bacteria

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    What Is Bacteria?