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

$P$

$\uparrow$

Family

$\uparrow$

$Q$

$\uparrow$

Species

Order being a higher category,is the assemblage of................. which exhibit a few similar characters.

Define and explain the taxonomic category: Class.

Who is known as the father of taxonomy?

Select the correct option on the basis of the following sentences:
$I.$ Biological names are generally in French.
$II.$ The first word in a biological name represents the genus.
$III.$ The second word in a biological name is written in a capital letter.
$IV.$ When the scientific name is handwritten,it should be underlined.

In an organism's scientific name,the second word indicates........