Which one of the following is a species?

In the given diagram,what do the labeled parts $P$ and $Q$ represent respectively?

Kingdom

$\uparrow$

$P$

$\uparrow$

Class

$\uparrow$

Order

$\uparrow$

$Q$

The common units of classification are given below. Arrange them in the correct sequence starting from the smallest unit:
$(i)$ Genus $(ii)$ Family $(iii)$ Species $(iv)$ Order $(v)$ Subspecies

Which of the following taxonomic categories contains the maximum number of organisms?

In the given taxonomic hierarchy diagram, what do "$P$" $\rightarrow$ and "$Q$" $\rightarrow$ represent respectively?

Which of the following statements is consistent with the taxonomic category 'Family'?