Bacteria

Cyanobacteria-Blue-green bacteria

Cyanobacteria The name Cyanophyta (Gr. kyanos=blue + phyta= plants) has recently been adopted for this division. The division was named Myxophyta (Gr. + phyton=a plant) previously. It includes a single class Cyanophyceae. Most of the characteristics possessed by the members of this division are similar to those present in the bacteria, therefore these are placed along with bacteria in Kingdom. ...

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General Economic Importance of Bacteria

General Economic Importance of Bacteria The bacteria can be deliberately exploited by humans in a number of beneficial ways. However, some bacteria play harmful roles, for example they cause disease and spoil food. Thus, economic importance of bacteria includes both their useful and harmful aspects. Useful Bacteria Most bacteria are beneficial to mankind and play some economically important roles. Some ...

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Biological Importance of Bacteria

Biological Importance of Bacteria Bacteria are important for their natural roles in the biosphere, for example role in rhizosphere, nodulation, and nitrogen cycling. Role of Bacteria in Rhizosphere The region where the soil and roots make contact is called the rhizosphere. The rhizosphere is a complex biological system in which the bacterial population is considerably higher on and around the ...

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Nutrition in Bacteria

Nutrition in Bacteria The bacteria can be classified into two nutritional categories on the basis of their nutritional requirements: the autotrophic and heterotrophic bacteria. Autotrophic Bacteria The bacteria that are able to synthesize organic compounds necessary for their survival from simple inorganic substances are called autotrophic bacteria. They obtain carbon from inorganic compounds, mostly from carbon dioxide. The autotrophic bacteria ...

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Reproduction in Bacteria

Reproduction in Bacteria The most common method of reproduction in bacteria is sexual reproduction. but they also reproduce sexually by genetic recombination’s. a primitive type of sexual reproduction. Asexual Reproduction The usual methods of asexual reproduction are binary fission and endospore formation. Binary Fission It is the most common way of asexual reproduction in bacteria. It takes plane when the ...

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Growth in Bacteria

Growth in Bacteria In case of bacteria the term growth refers to changes in the total population rather than increase in the size or mass of an individual organism. The bacteria can grow rapidly because they have a large surface area to volume ratio and can therefore gain food rapidly from their environment by diffusion and active transport. Certain environmental ...

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Structure of Bacterial Cell

Structure of Bacterial Cell A bacterial cell consists of various components. Some of these are external and the others are internal to the cell wall. The external components include capsules and slime layers, flagella and pilli. Some structures are present only in certain species. Capsule and Slime Layer Many bacteria secrete sticky substance that form protective layers called capsule outside ...

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Bacteria

Bacteria Bacteria are the smallest organisms having a cellular structure. They are unicellular prokaryotic organisms classified as microorganisms. The study of bacteria is called bacteriology. Occurrence The bacteria occupy many environments, such as: soil, dust, water, air, in and on animals and plants and they can even be found in hot springs at temperature at 70° C or higher. Their ...

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