Identify the family of the animal.

Which scientific term is used for a convenient category for the study of organisms like fishes and mammals?

As we go higher from species to kingdom in the taxonomic hierarchy,the number of common characteristics shared by the organisms:

What criteria must be followed for naming a plant technically at present?

Assertion $A$: Scientific nomenclature provides a precise identification of an organism.
Reason $R$: Every organism is given two names,a generic name and a specific epithet.
Which option is correct for Assertion $A$ and Reason $R$?

What is the basic unit of classification?