$X, Y$ and $Z$ are living organisms.
$(a)$ Identify the group to which they belong on the basis of following features:
$(i)$ $X -$ Microscopic,unicellular,prokaryotic.
$(ii)$ $Y -$ Microscopic,unicellular,eukaryotic and shows locomotion with the help of pseudopodia/flagella.
$(iii)$ $Z -$ Multicellular,filamentous,eukaryotic,autotrophic and aquatic.
$(b)$ Which amongst the above is most advanced?
$(c)$ Name one organism each belonging to the groups of $X, Y$ and $Z$.

(N/A) $(i)$ $X$ belongs to Kingdom Monera because it is unicellular and prokaryotic.
$(ii)$ $Y$ belongs to Kingdom Protista because it is unicellular,eukaryotic,and exhibits locomotion via pseudopodia or flagella.
$(iii)$ $Z$ belongs to Kingdom Plantae (specifically the division Thallophyta) because it is multicellular,eukaryotic,autotrophic,and aquatic.
$(b)$ Among the groups identified,$Z$ (Plantae) is the most advanced as it consists of complex,multicellular,autotrophic organisms compared to the unicellular Monera and Protista.
$(c)$ Examples:
$X -$ Bacteria (e.g.,$Escherichia \ coli$)
$Y -$ Amoeba or Euglena
$Z -$ Spirogyra