The modern system of classification classifies organisms into how many kingdoms?

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

Select true statements from the followings $:-$
$(i)$ Aristotle used morphological characters to classify plants.
$(ii)$ Two kingdom classification was proposed by Linnaeus.
$(iii)$ Whittaker used Habitat information in his five kingdom classification.
$(iv)$ Archaebacteria can live under extreme conditions.

Which of the following may be referred to as 'badsonia'?

$A$: Bacteria and Anabaena contain nucleoprotein as genetic material.
$R$: Euglena possesses a well-organized nucleus.

In the $3$-domain system of classification,into which domain are prokaryotic and eukaryotic organisms divided?