Bacteria

Oscillatoria Structure and Reproduction

Oscillatoria Taxonomic Position Kingdom: Bacteria Division: Cyanobacteria Class: Cyanophyceae Order: Oscillatoriales Family: Oscillatoreaceae Genus: Oscillatoria Occurrence It occurs in wide variety of habitat. It is common in fresh water, damp place, ditches, drains etc. it is also found as patches on the mud surface. It is most common in moist places where abundant organic matter is present. Patches of entangled ...

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Anabaena

Anabaena Taxonomic Position Kingdom: Bacteria Phylum:    Cyanobacteria Class:       Cyanophyceae Order:      Nostocales Family:     Nostocaceae Genus:     Anabaena Occurrence Anabaena (Gr. Anabaniein=to arise) is a filamentous blue green alga. The genus contains both planktonic species and some that form coatings on other aquatic vegetation. A few species are endophytic and grow in cavities between the leaves of the water fern Azolla ...

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Nostoc classification-structurere and production

Nostoc Taxonomic Position Kingdom: Bacteria Phylum:   Cyanobacteria Class:        Cyanophyceae Order:      Nostocaies Family:     Nostocaceae Genus:     Nostoc Occurrence Nostoc is common in fresh ponds. The large colonies found free floating as small circular balls. It may be attached to the submerged plants. Nostoc can be found in soils on moist rocks, at the bottom of lakes and springs (both fresh- and saltwater), ...

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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 ...

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