Why are the classification systems changing every now and then?

Q.2:- Why are the classification systems changing every now and then?

 

Answer:-

Millions of plants, animals, and microorganisms are found on earth. Many of these have been identified by the scientists while many new species are still being discovered around the world. Therefore, to classify these newly discovered species, new systems of classification have to be devised every now and then. This creates the requirement to change the existing systems of classification.