Answer :
The correct form for writing binomial nomenclature is:
Genus species
In binomial nomenclature, which is the system used for naming species, the name consists of two parts: the genus name and the species name. These names are italicized when printed and the genus name is capitalized while the species name is in lowercase. For example, Homo sapiens is the binomial name for humans, where "Homo" is the genus name and "sapiens" is the species name.
Therefore, the correct format for writing binomial nomenclature is "Genus species" with the genus name capitalized and the species name in lowercase. This standardized naming system helps scientists worldwide communicate clearly about different species.