Sulaiman

Viruses

Viruses Virus is a small infectious agent that causes various diseases. The study of viruses is called virology. Word virus means poison. These are small minute non cellular bodies that are considered as living as well as non-living or placed at a borderline between living and non-living.

Armen Takhtajan’s System of Classification

Armen Takhtajan’s System of Classification Takhtajan was a Russian plant taxonomist.He was a leading plant taxonomist in an international authority on phytogeography, origin and phylogeny of flowering plants.He developed a classification system on the basis of phylogenetic relationships. Takhtajan developed his classification scheme in 1940 that was published in Russian language in 1954 and was …

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Taxonomic categories

Taxonomic categories Taxonomy is the science of identifying, naming and classifying all the organisms. Animal kingdom is the world largest kingdom in biology that contains millions of species (Approximately 8.7 million). Plant kingdom is the second largest kingdom, which contains about 300,000 species.

Bentham and Hooker’s System of Classification

Bentham and Hooker’s System of Classification George Bentham and Sir Joseph Dalton Hooker developed a system of classification. They published thier work in Latin, which was entitled “Genera Plantarum”.This system of classification is a natural non-phylogenetic system which is a slight modification of de-Condolle’s system of classification.In this system, the flowering plants are divided on …

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Types, Structure and Shapes of Bacteria

Bacteria Word bacteria (singular bacterium) means small rod because the first bacteria were rod shaped. Bacteria are the smallest unicellular prokaryotic organisms (Organisms that lack true nucleus and membrane bounded organelles) that cannot be seen with naked eye but can be seen only with the help of microscope. Bacteria were discovered by a Dutch scientist …

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