As we move from species to kingdom,the characteristics of organisms:

In the scientific name of an organism, what does the second component represent?

Which of the following $statement(s)$ is/are not correct?
$(i)$ Genus comprises a group of related species which has more characters in common in comparison to species of other genera.
$(ii)$ Three different genera such as $Solanum$,$Datura$ and $Petunia$ are placed in the family $Malvaceae$.
$(iii)$ In case of plants,classes with a few similar characters are assigned to a higher category called phylum.

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

Two similar holotypes are called

The suffix used for denoting a sub-family in biological classification is .........