In biological nomenclature,which name of an organism,once used,cannot be used for the naming of any other organism?

Gorillas,chimpanzees,monkeys,and humans belong to the same ..........

Define the following terms:
$(i)$ Variations
$(ii)$ Nomenclature

Which of the following is incorrect regarding the rules of nomenclature?

Which of the following represents the correct ascending order of taxonomic categories based on the number of organisms?

Select the correct statements $(i-iv)$ regarding taxonomic categories.
$(i)$ Each step or rank in hierarchy is called taxonomic category.
$(ii)$ Species is a group of individual organisms with fundamental similarities capable of breeding among themselves.
$(iii)$ Taxonomic studies of all unknown 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.