Question

What modifications were suggested by margulis and Schwartz and Whittaker's scheme

Answer 1

He was the first to propose the five-kingdom of organisms taxonomicclassification of the world's biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969. 

Answer 2

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.

Another interesting area for Margulis was the long bonding with British scientist James Lovelock on the Gaia hypothesis.

It proposed that the planet can be seen as a single self-regulating organism.