Which two classification categories are used in binomial nomenclature? a) kingdom and order b) phylum and family c) genus and species d) order and class

c) genus and species

Explanation:

Binomial nomenclature is the method of scientifically naming the living organisms. Accordingly, the name of each living being consists of two words: the first word represents the name of the genus and the second word is species epithet.  

For example: according to binomial nomenclature, the scientific name of mango is: Mangifera indica

Here, Mangifera and indica represent the genus and species of the mango respectively.  

a compound light microscope is used to magnify objects in steps.  

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