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Friday, 27 January 2017

Biological Classification - I



       Biological classification is the scientific procedure of arranging organisms into groups and subgroups on the basis of their similarities and dissimilarities and placing the group in a hierarchy of categories.

Importance of classification-

· It is not possible to study every organism. Study of one or two organism of a group gives sufficient information about the essential features of the group.

· It helps in identification of new organism.

· Classification helps in knowing the relationship amongst different groups of organisms.

· The organism of past cannot be studied without a proper system of classification.
Artificial system of classification- One or two morphological characters for grouping of organism is used only. Flowering and non-flowering plants, enaima and anaima. Aristotle classification.

Natural system of classification : Takes into consideration comparable study of a number of characters so as to bring out natural similarities and dissimilarities and hence natural relationships among the organisms. Bentham and Hooker classification etc.

 Phylogenetic System of Classification : 
 Based on the evolutionary relationship of organisms. 
 In this system organism are classified on the basis of their evolution on earth from primitive to highly evolved.
 Engler and Prantl classification and Hutchinson classification etc.


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