In this article we will discuss about the nutrition needed by autotrophic and heterotrophic bacteria. Most of the bacteria lack chlorophyll. They are thus unable to synthesize organic compounds which they need as food from simple inorganic substances. They obtain these from the external sources readymade. For this reason these organisms are put in the category of heterotrophic plants. However, [...]
In this article we will discuss about the life history of bacillus subtilis. It is popularly known as Hay bacillus. It is a common example of a rod-shaped bacterium. A rich culture of the bacterium can easily be prepared in the laboratory. Take hay and chop it into small pieces. Put the chopped bits in water to prepare an infusion. [...]
In this article we will discuss about:- 1. Shape of Viruses 2. Microstructure of Viruses 3. Economic Importance 4. Affinities 5. Control of Diseases. Shape of Viruses: The shapes of virus particles or viruses are known chiefly from electron micrographs. The viruses may be spherical, rod like, brick-shaped B or shaped like a tadpole with a head and slender tail [...]