Today, bacteria are considered as one of the oldest forms of life on earth. Even though most bacteria make us ill, they have a long-term, mutual relationship with humans and are very much important for our survival. But before we elaborate on its uses, let us know the structure of bacteria, its classification, and the bacteria diagram in detail.

Bacteria are found in every living thing on earth: soil, rocks, oceans, and even Arctic ice. 4 types of bacteria: The comma (Vibrios): Vibrio is any of the group of comma-shaped bacteria in the Vibrionaceae family. Vibrios are aquatic microorganisms, some species that cause serious diseases in humans and other animals.

The outer covering of a bacteria cell is the cell wall, which is rigid and provides structural integrity; The bacteria cell wall is made up of peptidoglycan or murein; Different shapes of bacteria cell are the characteristic feature of a bacteria species; Bacteria cells may contain external appendages like cilia, flagella, etc.

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.

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.

Bacteria mainly reproduce by binary fission. It is a kind of asexual reproduction. Bacteria also show primitive types of sexual reproduction through direct DNA transfer from one bacterium to another by the process of conjugation, transformation or transduction (virus-mediated). Some of the common diseases caused by pathogenic bacteria are as ...

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

Bacteria are of different types depending on their shapes and sizes. E.g., spherical-shaped bacteria are known as cocci; rod-shaped bacteria are known as bacilli; spiral-shaped, spirilla, etc. They reproduce through binary fission, transfer of genetic material occurs through transformation, transduction and conjugation, and through sporulation.

Bacterial diseases are diseases caused by bacteria. There are a number of bacteria found in the human body. A variety of these do not cause any infections and are known as “good bacteria”. The bacteria that cause diseases in humans are called “harmful bacteria”. There are thousands of bacteria present in the gut that are beneficial for ...

The two different types of autotrophic bacteria are: Photoautotrophs – or photosynthetic. They derive energy from sunlight. Chemoautotrophs – or chemosynthetic. They use chemical energy to prepare their food. Apart from energy requirements, both types of bacteria need a carbon source to synthesize their food, e.g. carbon dioxide and other ...