What do the parts labeled $P$ and $Q$ represent in the given figure?

Identify the correct option for the following statements:
$(i)$ It represents a group at different levels in classification.
$(ii)$ It is a meaningful event for organisms.
$(iii)$ Organisms strive to achieve this for the maximum utilization of nature.
$(iv)$ Morphogenesis occurs during this process.

What are the levels of organization with conceptual size shown in the figure below?

Plants growing on sandstone are known as:

Match the following columns:

Column-$I$ (Genus)	Column-$II$ (Family)
$i$. $Zea$	$a$. $Blattidae$
$ii$. $Helianthus$	$b$. $Poaceae$
$iii$. $Pheretima$	$c$. $Asteraceae$
$iv$. $Periplaneta$	$d$. $Megascolecidae$

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

Column $X$	Column $Y$
$(1)$ Death	$(P)$ Measure of disorder
$(2)$ Earthworm	$(Q)$ Proponent of New Systematics
$(3)$ Entropy	$(R)$ Process maintaining life continuity
$(4)$ Huxley	$(S)$ Annelida
$(5)$ Reproduction	$(T)$ Process maintaining population size