Which of the following taxonomic categories combine to form a Phylum?

The branch of Botany concerned with the classification,nomenclature,and identification of plants is:

In the following taxa, which taxon has the least similarity in characters?

........... is the genus of man.

Which of the following options shows an increase in the degree of dissimilarity between organisms as we move from one taxonomic category to another?

Select the correct statements $(i-iv)$ regarding taxonomic categories.
$(i)$ Each step or rank in the hierarchy is called a taxonomic category.
$(ii)$ Species is a group of individual organisms with fundamental similarities capable of breeding among themselves.
$(iii)$ Taxonomic studies of all known organisms have led to the development of common categories like kingdom,phylum or division,class,order,family,genus and species.
$(iv)$ Lower the category,greater is the difficulty of determining the relationship to other taxa at the same level.