Discuss how classification system have undergone several changes over a period of time
Answers
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Linnaeus proposed a two kingdom system of classification with Plantae and Animalia kingdoms was developed that included all plants and animals respectively.
Thus, over a period of time, classification system have undergone several changes.
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Explanation:
The classification systems have undergone several changes with respect to time. Such as,
*Aristotle first started the classification system.
* He classified plants as herbs, shrubs, and trees. Animals, on the other hand, were classified on the basis of presence or absence of red blood cells.
* This system of classification failed to classify all the known organisms.
*But Linnaeus gave a two kingdom system of classification. It consists of kingdom Plantae and kingdom Animalia.
*But soon,this system was not able to create differences between unicellular and multicellular organisms and between eukaryotes and prokaryotes.
*Therefore, there were large numbers of organisms that could not be classified under the two kingdoms.
*Then a five kingdom system of classification was proposed by R.H Whittaker in 1969. On the basis of characteristics, such as cell structure, mode of nutrition, cell wall etc.