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Showing posts from February 24, 2012

Exam Ready Notes ::Micro-organisms

microorganismsormicrobes cannot seen without any suitable microscopeMicroorganisms are classified into fourmajorgroups.Thesegroupsarebacteria,  fungi,  protozoa andsome algaeVirusesare also microscopic. They, however,reproduceonlyinsidethecellsof the host organism, which may be a bacterium,plantoranimalCommon ailments like cold, influenza (flu) and most coughs are caused by viruses. Seriousdiseaseslikepolioandchicken poxarealsocausedbyviruses.Diseaseslikedysenteryandmalaria arecausedbyprotozoanswhereastyphoid and tuberculosis (TB) are bacterialdiseases.   ----------------