Which classification system was proposed by $R.H. Whittaker$?

The three-domain system of classification is based on which of the following criteria?

Each of the following characteristics represents a Kingdom proposed by Whittaker. Arrange the following in increasing order of complexity of body organization.
$A.$ Multicellular heterotrophs with cell wall made of chitin.
$B.$ Heterotrophs with tissue/organ/organ system level of body organization.
$C.$ Prokaryotes with cell wall made of polysaccharides and amino acids.
$D.$ Eukaryotic autotrophs with tissue/organ level of body organization.
$E.$ Eukaryotes with cellular body organization.

In the three-domain system of classification,into which domains are prokaryotic and eukaryotic organisms divided?

How many orders does the series Bicarpellatae contain?

In the five-kingdom classification system,how many kingdoms are eukaryotic?