In Whittaker's classification system,which kingdom is the primary producer?

Differentiate between Kingdom Monera and Kingdom Protista.

Which one of the following is not the basis of five kingdom classification?

Arrange the following microbes/organisms in ascending order according to their complexity of body (from simple to complex):
$a$ - animal,$b$ - viroids,$c$ - bacteria,$d$ - virus,$e$ - algae.

$A.$ In bread mold,embryo formation does not occur as a result of sexual reproduction.
$R.$ In bath sponge,the cell wall is made of cellulose.

Which of Whittaker's kingdoms include producers?