When did $R.H. Whittaker$ propose the five-kingdom classification system?

Classification of organisms on the basis of fossil records that plays an important role in the elucidation of evolutionary relationships is:

Into how many domains is the classification system of $Carl$ $Woese$ divided?

$A.$ The Eukarya domain is divided into five kingdoms.
$R.$ The three-domain classification system was proposed by $Carl$ $Woese$.

$R$.$H$. Whittaker is famous for ...........

Discuss how classification systems have undergone several changes over a period of time.