Most of the unicellular organisms are kept under

The five-kingdom classification system was proposed by whom?

Which one single organism or the pair of organisms is correctly assigned to its taxonomic group?

Which of Whittaker's kingdoms include producers?

Which of the following classification systems represents the evolutionary relationship of organisms?

Which of the following statements are incorrect based on the Whittaker classification system?
$I.$ Whittaker classified organisms into unicellular and multicellular based on the complexity of cell structure.
$II.$ Whittaker classified organisms as producers,decomposers,and consumers based on their ecological roles.
$III.$ Organisms were divided into unicellular and multicellular based on the complexity of body organization.
$IV.$ Prokaryotic and eukaryotic organisms were divided based on their mode of nutrition.