Monday, June 21, 2010

Why does not the viruses have got the place in the classification of the organisms?

Viruses are neither animals nor plants. They are dead if they are not provided with living materials. When they find a host, only then, will they start to live, grow and multiply.



Why does not the viruses have got the place in the classification of the organisms?photoshop



HI:



The basis for classification of organisms is their ability to reproduce autonomously. Viruses are a sort of bridge between the living and non-living.



They are living, in the sense that they can infect host cells, replicate their DNA, either using their own enzymes or more usually by hijacking the host machinery, for propagation. They are also non-living, bacause in the absence of any potential host cells to infect, they can remain dormant. In fact, they can be crystallized in their latent form but when presented with a host cell, they regain infectivity.



Their anomalous nature does not allow them to be part of the whole classification system.



Viruses have a huge classification system within themselves depending on various criteria, like the host they infect (bacteria, plants, animals), and very many sub-divisions within.



In the evolutionary tree, viruses are followed by intracellular bacteria, like Chlamydiae, followed by higher bacteria and eukaryotes.



Hope this helps. Cheers!



Why does not the viruses have got the place in the classification of the organisms?symatec

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