In which book was "binomial nomenclature" used for the first time?

What does $ICZN$ stand for?

$A$ species is defined as "the group of actually or potentially inter-breeding natural populations producing fertile offspring and reproductively isolated from such other groups". The above statement is given by

Give a scientific reason: There is a need to standardize the names of living organisms.

The best definition of a species is:

The name $Rauwolfia$ was given by whom?