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The structure of bacteria is known for its simple body design. Bacteria are single-celled microorganisms with the absence of the nucleus and other cellorganelles; hence, they are classified as prokaryotic organisms. They are also very versatile organisms, surviving in extremely inhospitable conditions.
Bacteria: Bacteria are microscopic, relatively simple, prokaryotic organisms whose cells lack a nucleus. They lack cell organelles except for ribosomes. The cell wall is present in bacteria. Different types of bacteria: Bacillus: The shape of the cell is rod-like. Example - Bacillus anthracis; 2. Coccus: The shape of the cell is spherical or ovoid.
Pathogens are microorganisms that cause various diseases in plants and animals. Most pathogens are parasites, i.e. they harm their hosts. The main five categories of pathogens are viruses, bacteria, fungi, protozoa and helminths. Pathogens are infectious agents. They can enter the body by various means.
There are various diseases that are caused by bacteria in humans. Some of the common bacterial diseases in humans are tuberculosis, pneumonia, typhoid, tetanus, etc. Bacteria that cause various diseases in humans are known as pathogenic bacteria. We are able to sustain the growth of many bacteria due to the innate immunity provided by the body ...
Bacillus, meaning “stick”, is a genus of rod-shaped, Gram-positive bacteria, a member of the Bacillota phylum, with 266 identified species. The term refers to the shape (rod) of other similarly shaped bacteria, and the plural name of the bacteria class is Bacilli. Bacillus species can either be facultative anaerobes, which can exist with or ...
Pleomorphic bacteria can change their size and shape based on external factors. Example – Mycoplasma pneumonia. Cocci Bacteria . The term cocci is derived from the Greek word kokkos, meaning berry or seed. Cocci include archaeon or bacteria that are generally round, oval or spherical in shape. Types of Cocci Bacteria
Answer. There are four types of bacteria on the basis of the shape: Coccus form: These bacteria are spherical or oval in shape. Example: Streptococcus pyogenes. Bacillus form: These are rod-shaped bacteria that occur singly or in groups of two or three joined together to form a long chain. Example: Bacillus coagulans.
Nutritional Types of Bacteria. Autotrophs. Photoautotroph. Chemoautotroph. Heterotrophs. Photoheterotrophs. Chemoheterotrophs. Bacteria are prokaryotic organisms that require nutrients and energy for their growth and development like other living organisms. They require carbon, hydrogen, oxygen, nitrogen, metals and water for their biochemical ...
Gram-Positive and Gram-Negative Bacteria – Overview. The gram-positive bacteria retain the crystal violet colour and stain purple whereas the gram-negative bacteria lose crystal violet and stain red. Thus, the two types of bacteria are distinguished by gram staining. Gram-negative bacteria are more resistant to antibodies because their cell ...
There are three different types of horizontal transmission for the transfer of genetic information. Conjugation; Transduction; Transformation; Bacterial Conjugation. Conjugation is the method of transfer of genetic material from one bacteria to another placed in contact. This method was proposed by Lederberg and Tatum.