The following points highlight the three main processes involved in the genetic recombination of bacteria. The processes are: 1. Conjugation 2. Transformation 3. Transduction. Process # 1. Conjugation: Lederberg and Tatum (1946) discovered conjugation in E. coli and its detailed studies were made by Woolman and Jacob (1956). Conjugation, is a process by which genetic material is transferred from one [...]
The following points highlight the two common examples of Cyanobacteria. The examples are: 1. Spirulina and 2. Nostoc. Spirulina: It is a spirally coiled free floating filamentous blue green alga or cyanobacterium of up to 0.5 mm length. The trachoma's appear to be unicellular but staining and electron microscopy has shown the presence of thin transverse walls. The ends are [...]
In this article we will discuss about:- 1. Occurrence of Cyanobacteria 2. Morphology of Cyanobacteria 3. Cell Structure 4. Heterocyst 5. Reproduction. Occurrence of Cyanobacteria: Cyanobacteria or blue green algae are the one of most successful auÂtotrophic organisms on earth which have mastered all types of environments— fresh water, sea water, salt marshes, moist rocks, tree trunks, moist soils, hot [...]