In the 1990s, many scientists agreed that the five-kingdom classification scheme should be expanded to six kingdoms. which discovery
supported this decision?
a
fungi differed significantly from both plants and animals
b. two groups of monerans-eubacteria and archaebacteria--differed significantly from one another
c
protists are not a true kingdom, and should be classified in at least two different kingdoms
d. fungi are not a true kingdom, and should be classified in at least two different kingdoms

B. Two groups of monerans-Eubacteria and Archaebacteria--differed significantly from one another

Explanation:

It was Carl Woese who divided the prokaryotes into 2 kingdoms, Eubacteria and Archaebacteria based on RNA studies. So. this led to additional 6th classification added to Whittaker's classification of 5 kingdoms.

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.

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