Question

Q-1: What changes are proposed by L. Margulius and K. Schwartz in the five
kingdom classification system of Robert Whittaker? ​

Answer 1

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The modifications suggested by Margulis and Schwartz 

and Whittaker's scheme was that they proposed the five kingdoms of organisms. They classified the world's ecologic distribution into five separate entities that are known as Plantae, Protista, Animalia, Monera and Fungi. The modification was carried out in 1969.