Answers

2014-10-11T16:50:20+05:30
they ussualy use the classification system made by Carolous Linneas kingdom, phylum, class, order , family, genus, species
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2014-10-11T16:53:26+05:30
Since it is nearly impossible to study all the living organisms , it is necessary to devise some means to make this possible . so, on this basis modern classification  is  made up..  
and CLASSIFICATION -  classification is the process by which anything is grouped into convenient categories based on some easily observable characters.
 for example , we can recognize groups such as plants or animals . 
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