What does each step in the taxonomic hierarchy represent?

Match Column-$I$ with Column-$II$ for the classification of the housefly and select the correct option using the codes given below:

Column-$I$	Column-$II$
$(a)$ Family	$(i)$ Diptera
$(b)$ Order	$(ii)$ Arthropoda
$(c)$ Class	$(iii)$ Muscidae
$(d)$ Phylum	$(iv)$ Insecta

The book "Genera Plantarum", which contains the classification of seed plants, was written by .......

Naming of cultivars is determined by

Match the following organisms with their scientific names,orders,and families:

Common Name	Scientific Name	Order	Family
$a$. Earthworm	$p$. Rana tigrina	$w$. Glumiflorae	$1$. Poaceae
$b$. Sunflower	$q$. Zea mays	$x$. Anura	$2$. Asteraceae
$c$. Frog	$r$. Pheretima posthuma	$y$. Opisthopora	$3$. Megascolecidae
$d$. Maize	$s$. Helianthus annuus	$z$. Asterales	$4$. Ranidae

$Order$ is the assemblage of families which exhibit a few similar characters.