Which of the following is a true characteristic of the Kingdom Plantae?

Match Column $X$ with Column $Y$ and select the correct option:

Column $X$	Column $Y$
$(1)$ Nostoc	$(P)$ Filamentous
$(2)$ Chlamydomonas	$(Q)$ Cyanobacteria
$(3)$ Spirogyra	$(R)$ Colonial algae
$(4)$ Volvox	$(S)$ Unicellular algae

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

Identify the correct evolutionary sequence of Whittaker's five kingdoms.

The sexual system of classification is:

Out of the four statements $(1-4)$ given below,two are correct regarding Whittaker's classification system. Which two are correct?
$(1)$ Classification based on cell complexity
$(2)$ Classification based on mode of nutrition
$(3)$ Classification based on phylogenetic relationships
$(4)$ Classification based on habitat type